/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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 14:14:51,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 14:14:51,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 14:14:51,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 14:14:51,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 14:14:51,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 14:14:51,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 14:14:51,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 14:14:51,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 14:14:51,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 14:14:51,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 14:14:51,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 14:14:51,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 14:14:51,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 14:14:51,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 14:14:51,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 14:14:51,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 14:14:51,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 14:14:51,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 14:14:51,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 14:14:51,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 14:14:51,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 14:14:51,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 14:14:51,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 14:14:51,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 14:14:51,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 14:14:51,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 14:14:51,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 14:14:51,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 14:14:51,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 14:14:51,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 14:14:51,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 14:14:51,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 14:14:51,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 14:14:51,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 14:14:51,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 14:14:51,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 14:14:52,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 14:14:52,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 14:14:52,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 14:14:52,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 14:14:52,054 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 14:14:52,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 14:14:52,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 14:14:52,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 14:14:52,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 14:14:52,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 14:14:52,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 14:14:52,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 14:14:52,056 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 14:14:52,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 14:14:52,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 14:14:52,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 14:14:52,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 14:14:52,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 14:14:52,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 14:14:52,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 14:14:52,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 14:14:52,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 14:14:52,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 14:14:52,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 14:14:52,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 14:14:52,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 14:14:52,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 14:14:52,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 14:14:52,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 14:14:52,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 14:14:52,503 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 14:14:52,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2020-12-22 14:14:52,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05790eeb0/ff875203b06e4b819cc99276562c8ec3/FLAGc16f18d35 [2020-12-22 14:14:53,616 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 14:14:53,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2020-12-22 14:14:53,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05790eeb0/ff875203b06e4b819cc99276562c8ec3/FLAGc16f18d35 [2020-12-22 14:14:54,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05790eeb0/ff875203b06e4b819cc99276562c8ec3 [2020-12-22 14:14:54,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 14:14:54,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 14:14:54,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 14:14:54,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 14:14:54,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 14:14:54,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:14:54" (1/1) ... [2020-12-22 14:14:54,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726f1128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:54, skipping insertion in model container [2020-12-22 14:14:54,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:14:54" (1/1) ... [2020-12-22 14:14:54,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 14:14:54,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 14:14:55,316 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2020-12-22 14:14:55,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 14:14:55,378 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 14:14:55,610 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2020-12-22 14:14:55,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 14:14:55,700 INFO L208 MainTranslator]: Completed translation [2020-12-22 14:14:55,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55 WrapperNode [2020-12-22 14:14:55,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 14:14:55,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 14:14:55,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 14:14:55,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 14:14:55,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:55,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:55,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 14:14:55,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 14:14:55,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 14:14:55,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 14:14:55,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:55,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:56,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:56,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:56,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:56,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:56,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (1/1) ... [2020-12-22 14:14:56,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 14:14:56,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 14:14:56,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 14:14:56,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 14:14:56,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (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 14:14:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 14:14:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 14:14:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 14:14:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 14:14:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 14:14:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 14:14:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 14:14:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 14:14:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 14:14:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 14:14:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 14:14:56,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 14:15:00,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 14:15:00,340 INFO L299 CfgBuilder]: Removed 1215 assume(true) statements. [2020-12-22 14:15:00,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:15:00 BoogieIcfgContainer [2020-12-22 14:15:00,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 14:15:00,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 14:15:00,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 14:15:00,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 14:15:00,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:14:54" (1/3) ... [2020-12-22 14:15:00,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7763ff44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:15:00, skipping insertion in model container [2020-12-22 14:15:00,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:14:55" (2/3) ... [2020-12-22 14:15:00,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7763ff44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:15:00, skipping insertion in model container [2020-12-22 14:15:00,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:15:00" (3/3) ... [2020-12-22 14:15:00,361 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2020-12-22 14:15:00,369 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 14:15:00,376 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 14:15:00,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 14:15:00,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 14:15:00,462 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 14:15:00,462 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 14:15:00,462 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 14:15:00,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 14:15:00,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 14:15:00,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 14:15:00,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 14:15:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states. [2020-12-22 14:15:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 14:15:00,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:00,531 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, 1, 1, 1, 1, 1, 1, 1, 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 14:15:00,531 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1882859951, now seen corresponding path program 1 times [2020-12-22 14:15:00,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:00,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268887661] [2020-12-22 14:15:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:01,054 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 14:15:01,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268887661] [2020-12-22 14:15:01,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:01,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 14:15:01,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096333499] [2020-12-22 14:15:01,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 14:15:01,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:01,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 14:15:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 14:15:01,083 INFO L87 Difference]: Start difference. First operand 784 states. Second operand 2 states. [2020-12-22 14:15:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:01,183 INFO L93 Difference]: Finished difference Result 1564 states and 2069 transitions. [2020-12-22 14:15:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 14:15:01,185 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 55 [2020-12-22 14:15:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:01,212 INFO L225 Difference]: With dead ends: 1564 [2020-12-22 14:15:01,212 INFO L226 Difference]: Without dead ends: 776 [2020-12-22 14:15:01,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 14:15:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-12-22 14:15:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2020-12-22 14:15:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-12-22 14:15:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1001 transitions. [2020-12-22 14:15:01,368 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1001 transitions. Word has length 55 [2020-12-22 14:15:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:01,369 INFO L481 AbstractCegarLoop]: Abstraction has 776 states and 1001 transitions. [2020-12-22 14:15:01,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 14:15:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1001 transitions. [2020-12-22 14:15:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 14:15:01,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:01,375 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, 1, 1, 1, 1, 1, 1, 1, 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 14:15:01,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 14:15:01,376 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:01,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:01,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1826553015, now seen corresponding path program 1 times [2020-12-22 14:15:01,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:01,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393267729] [2020-12-22 14:15:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:01,702 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 14:15:01,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393267729] [2020-12-22 14:15:01,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:01,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:01,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273438180] [2020-12-22 14:15:01,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:01,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:01,706 INFO L87 Difference]: Start difference. First operand 776 states and 1001 transitions. Second operand 3 states. [2020-12-22 14:15:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:01,775 INFO L93 Difference]: Finished difference Result 783 states and 1007 transitions. [2020-12-22 14:15:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:01,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 14:15:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:01,781 INFO L225 Difference]: With dead ends: 783 [2020-12-22 14:15:01,782 INFO L226 Difference]: Without dead ends: 780 [2020-12-22 14:15:01,783 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 14:15:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-12-22 14:15:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 777. [2020-12-22 14:15:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-12-22 14:15:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1002 transitions. [2020-12-22 14:15:01,813 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1002 transitions. Word has length 55 [2020-12-22 14:15:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:01,813 INFO L481 AbstractCegarLoop]: Abstraction has 777 states and 1002 transitions. [2020-12-22 14:15:01,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1002 transitions. [2020-12-22 14:15:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 14:15:01,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:01,816 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, 1, 1, 1, 1, 1, 1, 1, 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 14:15:01,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 14:15:01,816 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1826493433, now seen corresponding path program 1 times [2020-12-22 14:15:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139338167] [2020-12-22 14:15:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:02,119 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 14:15:02,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139338167] [2020-12-22 14:15:02,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:02,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 14:15:02,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416486324] [2020-12-22 14:15:02,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:02,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:02,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:02,128 INFO L87 Difference]: Start difference. First operand 777 states and 1002 transitions. Second operand 3 states. [2020-12-22 14:15:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:02,208 INFO L93 Difference]: Finished difference Result 1517 states and 1961 transitions. [2020-12-22 14:15:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:02,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 14:15:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:02,229 INFO L225 Difference]: With dead ends: 1517 [2020-12-22 14:15:02,229 INFO L226 Difference]: Without dead ends: 1470 [2020-12-22 14:15:02,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2020-12-22 14:15:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1469. [2020-12-22 14:15:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-12-22 14:15:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1904 transitions. [2020-12-22 14:15:02,302 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1904 transitions. Word has length 55 [2020-12-22 14:15:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:02,303 INFO L481 AbstractCegarLoop]: Abstraction has 1469 states and 1904 transitions. [2020-12-22 14:15:02,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1904 transitions. [2020-12-22 14:15:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 14:15:02,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:02,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:02,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 14:15:02,308 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash -626449298, now seen corresponding path program 1 times [2020-12-22 14:15:02,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:02,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105716418] [2020-12-22 14:15:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 14:15:02,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105716418] [2020-12-22 14:15:02,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:02,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:02,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587693500] [2020-12-22 14:15:02,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:02,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:02,530 INFO L87 Difference]: Start difference. First operand 1469 states and 1904 transitions. Second operand 3 states. [2020-12-22 14:15:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:02,689 INFO L93 Difference]: Finished difference Result 3318 states and 4293 transitions. [2020-12-22 14:15:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:02,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 14:15:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:02,702 INFO L225 Difference]: With dead ends: 3318 [2020-12-22 14:15:02,702 INFO L226 Difference]: Without dead ends: 1886 [2020-12-22 14:15:02,707 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 14:15:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2020-12-22 14:15:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1844. [2020-12-22 14:15:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1844 states. [2020-12-22 14:15:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2383 transitions. [2020-12-22 14:15:02,798 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2383 transitions. Word has length 86 [2020-12-22 14:15:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:02,798 INFO L481 AbstractCegarLoop]: Abstraction has 1844 states and 2383 transitions. [2020-12-22 14:15:02,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2383 transitions. [2020-12-22 14:15:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 14:15:02,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:02,812 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 14:15:02,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 14:15:02,812 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:02,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1348298836, now seen corresponding path program 1 times [2020-12-22 14:15:02,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:02,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597477548] [2020-12-22 14:15:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 14:15:03,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597477548] [2020-12-22 14:15:03,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:03,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 14:15:03,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599359730] [2020-12-22 14:15:03,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 14:15:03,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:03,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 14:15:03,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 14:15:03,164 INFO L87 Difference]: Start difference. First operand 1844 states and 2383 transitions. Second operand 4 states. [2020-12-22 14:15:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:03,776 INFO L93 Difference]: Finished difference Result 6732 states and 8859 transitions. [2020-12-22 14:15:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 14:15:03,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-12-22 14:15:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:03,807 INFO L225 Difference]: With dead ends: 6732 [2020-12-22 14:15:03,808 INFO L226 Difference]: Without dead ends: 4925 [2020-12-22 14:15:03,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 14:15:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2020-12-22 14:15:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 1860. [2020-12-22 14:15:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-12-22 14:15:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2399 transitions. [2020-12-22 14:15:04,055 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2399 transitions. Word has length 151 [2020-12-22 14:15:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:04,056 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2399 transitions. [2020-12-22 14:15:04,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 14:15:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2399 transitions. [2020-12-22 14:15:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 14:15:04,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:04,063 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:04,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 14:15:04,064 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1581998956, now seen corresponding path program 1 times [2020-12-22 14:15:04,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:04,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96248118] [2020-12-22 14:15:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 14:15:04,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96248118] [2020-12-22 14:15:04,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:04,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:04,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380009349] [2020-12-22 14:15:04,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 14:15:04,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 14:15:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 14:15:04,652 INFO L87 Difference]: Start difference. First operand 1860 states and 2399 transitions. Second operand 4 states. [2020-12-22 14:15:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:05,986 INFO L93 Difference]: Finished difference Result 5326 states and 6867 transitions. [2020-12-22 14:15:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 14:15:05,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-12-22 14:15:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:06,007 INFO L225 Difference]: With dead ends: 5326 [2020-12-22 14:15:06,008 INFO L226 Difference]: Without dead ends: 3503 [2020-12-22 14:15:06,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 14:15:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2020-12-22 14:15:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 2232. [2020-12-22 14:15:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2232 states. [2020-12-22 14:15:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 2841 transitions. [2020-12-22 14:15:06,241 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 2841 transitions. Word has length 159 [2020-12-22 14:15:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:06,243 INFO L481 AbstractCegarLoop]: Abstraction has 2232 states and 2841 transitions. [2020-12-22 14:15:06,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 14:15:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 2841 transitions. [2020-12-22 14:15:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 14:15:06,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:06,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:06,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 14:15:06,261 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 325951085, now seen corresponding path program 1 times [2020-12-22 14:15:06,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:06,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214655905] [2020-12-22 14:15:06,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 14:15:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214655905] [2020-12-22 14:15:06,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:06,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 14:15:06,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102661298] [2020-12-22 14:15:06,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:06,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:06,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:06,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:06,594 INFO L87 Difference]: Start difference. First operand 2232 states and 2841 transitions. Second operand 3 states. [2020-12-22 14:15:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:06,867 INFO L93 Difference]: Finished difference Result 4427 states and 5639 transitions. [2020-12-22 14:15:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:06,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 14:15:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:06,882 INFO L225 Difference]: With dead ends: 4427 [2020-12-22 14:15:06,882 INFO L226 Difference]: Without dead ends: 2232 [2020-12-22 14:15:06,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2020-12-22 14:15:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2232. [2020-12-22 14:15:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2232 states. [2020-12-22 14:15:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 2833 transitions. [2020-12-22 14:15:07,149 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 2833 transitions. Word has length 172 [2020-12-22 14:15:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:07,150 INFO L481 AbstractCegarLoop]: Abstraction has 2232 states and 2833 transitions. [2020-12-22 14:15:07,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 2833 transitions. [2020-12-22 14:15:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 14:15:07,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:07,158 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:07,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 14:15:07,159 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:07,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 932207730, now seen corresponding path program 1 times [2020-12-22 14:15:07,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:07,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687161363] [2020-12-22 14:15:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 14:15:07,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687161363] [2020-12-22 14:15:07,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:07,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:07,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000366368] [2020-12-22 14:15:07,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:07,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:07,435 INFO L87 Difference]: Start difference. First operand 2232 states and 2833 transitions. Second operand 3 states. [2020-12-22 14:15:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:07,836 INFO L93 Difference]: Finished difference Result 5674 states and 7279 transitions. [2020-12-22 14:15:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:07,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2020-12-22 14:15:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:07,856 INFO L225 Difference]: With dead ends: 5674 [2020-12-22 14:15:07,856 INFO L226 Difference]: Without dead ends: 3479 [2020-12-22 14:15:07,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 14:15:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2020-12-22 14:15:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2268. [2020-12-22 14:15:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2020-12-22 14:15:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2865 transitions. [2020-12-22 14:15:08,076 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2865 transitions. Word has length 174 [2020-12-22 14:15:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:08,077 INFO L481 AbstractCegarLoop]: Abstraction has 2268 states and 2865 transitions. [2020-12-22 14:15:08,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2865 transitions. [2020-12-22 14:15:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 14:15:08,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:08,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:08,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 14:15:08,082 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash 657055926, now seen corresponding path program 1 times [2020-12-22 14:15:08,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:08,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183532249] [2020-12-22 14:15:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 14:15:08,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183532249] [2020-12-22 14:15:08,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340508931] [2020-12-22 14:15:08,434 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 14:15:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 14:15:09,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:09,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 14:15:09,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2020-12-22 14:15:09,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500545257] [2020-12-22 14:15:09,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:09,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:09,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:09,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:09,331 INFO L87 Difference]: Start difference. First operand 2268 states and 2865 transitions. Second operand 3 states. [2020-12-22 14:15:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:09,567 INFO L93 Difference]: Finished difference Result 4499 states and 5687 transitions. [2020-12-22 14:15:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:09,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2020-12-22 14:15:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:09,580 INFO L225 Difference]: With dead ends: 4499 [2020-12-22 14:15:09,580 INFO L226 Difference]: Without dead ends: 2268 [2020-12-22 14:15:09,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2020-12-22 14:15:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2268. [2020-12-22 14:15:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2020-12-22 14:15:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2863 transitions. [2020-12-22 14:15:09,826 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2863 transitions. Word has length 174 [2020-12-22 14:15:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:09,826 INFO L481 AbstractCegarLoop]: Abstraction has 2268 states and 2863 transitions. [2020-12-22 14:15:09,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2863 transitions. [2020-12-22 14:15:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 14:15:09,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:09,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:10,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 14:15:10,047 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash -553307982, now seen corresponding path program 1 times [2020-12-22 14:15:10,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:10,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534586368] [2020-12-22 14:15:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:10,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534586368] [2020-12-22 14:15:10,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:10,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:10,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975449706] [2020-12-22 14:15:10,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:10,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:10,323 INFO L87 Difference]: Start difference. First operand 2268 states and 2863 transitions. Second operand 3 states. [2020-12-22 14:15:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:11,186 INFO L93 Difference]: Finished difference Result 5651 states and 7209 transitions. [2020-12-22 14:15:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:11,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2020-12-22 14:15:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:11,207 INFO L225 Difference]: With dead ends: 5651 [2020-12-22 14:15:11,207 INFO L226 Difference]: Without dead ends: 3371 [2020-12-22 14:15:11,218 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 14:15:11,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2020-12-22 14:15:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 3371. [2020-12-22 14:15:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3371 states. [2020-12-22 14:15:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 4317 transitions. [2020-12-22 14:15:11,507 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 4317 transitions. Word has length 176 [2020-12-22 14:15:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:11,508 INFO L481 AbstractCegarLoop]: Abstraction has 3371 states and 4317 transitions. [2020-12-22 14:15:11,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 4317 transitions. [2020-12-22 14:15:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 14:15:11,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:11,552 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 14:15:11,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 14:15:11,553 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash -109407308, now seen corresponding path program 1 times [2020-12-22 14:15:11,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:11,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808087073] [2020-12-22 14:15:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 14:15:11,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808087073] [2020-12-22 14:15:11,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:11,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 14:15:11,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597792331] [2020-12-22 14:15:11,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 14:15:11,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:11,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 14:15:11,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 14:15:11,793 INFO L87 Difference]: Start difference. First operand 3371 states and 4317 transitions. Second operand 4 states. [2020-12-22 14:15:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:12,277 INFO L93 Difference]: Finished difference Result 7863 states and 10109 transitions. [2020-12-22 14:15:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 14:15:12,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2020-12-22 14:15:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:12,319 INFO L225 Difference]: With dead ends: 7863 [2020-12-22 14:15:12,322 INFO L226 Difference]: Without dead ends: 4529 [2020-12-22 14:15:12,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 14:15:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4529 states. [2020-12-22 14:15:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4529 to 3375. [2020-12-22 14:15:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3375 states. [2020-12-22 14:15:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3375 states to 3375 states and 4321 transitions. [2020-12-22 14:15:12,668 INFO L78 Accepts]: Start accepts. Automaton has 3375 states and 4321 transitions. Word has length 176 [2020-12-22 14:15:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:12,668 INFO L481 AbstractCegarLoop]: Abstraction has 3375 states and 4321 transitions. [2020-12-22 14:15:12,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 14:15:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3375 states and 4321 transitions. [2020-12-22 14:15:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-22 14:15:12,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:12,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 14:15:12,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 14:15:12,680 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2136725343, now seen corresponding path program 1 times [2020-12-22 14:15:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:12,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702947695] [2020-12-22 14:15:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:13,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702947695] [2020-12-22 14:15:13,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629440798] [2020-12-22 14:15:13,018 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 14:15:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 14:15:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:13,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 14:15:13,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2020-12-22 14:15:13,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797636958] [2020-12-22 14:15:13,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 14:15:13,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 14:15:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 14:15:13,992 INFO L87 Difference]: Start difference. First operand 3375 states and 4321 transitions. Second operand 6 states. [2020-12-22 14:15:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:16,460 INFO L93 Difference]: Finished difference Result 22079 states and 28797 transitions. [2020-12-22 14:15:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 14:15:16,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2020-12-22 14:15:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:16,515 INFO L225 Difference]: With dead ends: 22079 [2020-12-22 14:15:16,515 INFO L226 Difference]: Without dead ends: 18741 [2020-12-22 14:15:16,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-12-22 14:15:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18741 states. [2020-12-22 14:15:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18741 to 3399. [2020-12-22 14:15:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3399 states. [2020-12-22 14:15:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 4345 transitions. [2020-12-22 14:15:17,094 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 4345 transitions. Word has length 179 [2020-12-22 14:15:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:17,095 INFO L481 AbstractCegarLoop]: Abstraction has 3399 states and 4345 transitions. [2020-12-22 14:15:17,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 14:15:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 4345 transitions. [2020-12-22 14:15:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 14:15:17,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:17,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 14:15:17,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 14:15:17,317 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1240279329, now seen corresponding path program 1 times [2020-12-22 14:15:17,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:17,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69590920] [2020-12-22 14:15:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:17,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69590920] [2020-12-22 14:15:17,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030034248] [2020-12-22 14:15:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 14:15:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:18,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 14:15:18,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-22 14:15:18,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514765334] [2020-12-22 14:15:18,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 14:15:18,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 14:15:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 14:15:18,507 INFO L87 Difference]: Start difference. First operand 3399 states and 4345 transitions. Second operand 8 states. [2020-12-22 14:15:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:22,905 INFO L93 Difference]: Finished difference Result 31699 states and 41345 transitions. [2020-12-22 14:15:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 14:15:22,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 180 [2020-12-22 14:15:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:22,994 INFO L225 Difference]: With dead ends: 31699 [2020-12-22 14:15:22,994 INFO L226 Difference]: Without dead ends: 28337 [2020-12-22 14:15:23,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 14:15:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28337 states. [2020-12-22 14:15:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28337 to 3419. [2020-12-22 14:15:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3419 states. [2020-12-22 14:15:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 4365 transitions. [2020-12-22 14:15:23,869 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 4365 transitions. Word has length 180 [2020-12-22 14:15:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:23,870 INFO L481 AbstractCegarLoop]: Abstraction has 3419 states and 4365 transitions. [2020-12-22 14:15:23,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 14:15:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 4365 transitions. [2020-12-22 14:15:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 14:15:23,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:23,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 14:15:24,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 14:15:24,093 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1021424611, now seen corresponding path program 1 times [2020-12-22 14:15:24,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:24,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583729666] [2020-12-22 14:15:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:24,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583729666] [2020-12-22 14:15:24,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:24,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 14:15:24,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634017994] [2020-12-22 14:15:24,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 14:15:24,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 14:15:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 14:15:24,346 INFO L87 Difference]: Start difference. First operand 3419 states and 4365 transitions. Second operand 5 states. [2020-12-22 14:15:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:25,714 INFO L93 Difference]: Finished difference Result 9923 states and 12927 transitions. [2020-12-22 14:15:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 14:15:25,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2020-12-22 14:15:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:25,730 INFO L225 Difference]: With dead ends: 9923 [2020-12-22 14:15:25,730 INFO L226 Difference]: Without dead ends: 6541 [2020-12-22 14:15:25,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 14:15:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2020-12-22 14:15:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 3599. [2020-12-22 14:15:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2020-12-22 14:15:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 4545 transitions. [2020-12-22 14:15:26,304 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 4545 transitions. Word has length 180 [2020-12-22 14:15:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:26,305 INFO L481 AbstractCegarLoop]: Abstraction has 3599 states and 4545 transitions. [2020-12-22 14:15:26,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 14:15:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 4545 transitions. [2020-12-22 14:15:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 14:15:26,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:26,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 14:15:26,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 14:15:26,313 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:26,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1687363285, now seen corresponding path program 1 times [2020-12-22 14:15:26,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:26,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976477560] [2020-12-22 14:15:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 14:15:26,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976477560] [2020-12-22 14:15:26,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:26,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:26,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699187692] [2020-12-22 14:15:26,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:26,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:26,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:26,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:26,659 INFO L87 Difference]: Start difference. First operand 3599 states and 4545 transitions. Second operand 3 states. [2020-12-22 14:15:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:27,242 INFO L93 Difference]: Finished difference Result 7182 states and 9077 transitions. [2020-12-22 14:15:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:27,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2020-12-22 14:15:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:27,252 INFO L225 Difference]: With dead ends: 7182 [2020-12-22 14:15:27,252 INFO L226 Difference]: Without dead ends: 3603 [2020-12-22 14:15:27,259 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 14:15:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2020-12-22 14:15:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 3603. [2020-12-22 14:15:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3603 states. [2020-12-22 14:15:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 4549 transitions. [2020-12-22 14:15:27,805 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 4549 transitions. Word has length 184 [2020-12-22 14:15:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:27,805 INFO L481 AbstractCegarLoop]: Abstraction has 3603 states and 4549 transitions. [2020-12-22 14:15:27,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 4549 transitions. [2020-12-22 14:15:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 14:15:27,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:27,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 14:15:27,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 14:15:27,816 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:27,818 INFO L82 PathProgramCache]: Analyzing trace with hash -142517545, now seen corresponding path program 1 times [2020-12-22 14:15:27,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:27,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162584963] [2020-12-22 14:15:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 14:15:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162584963] [2020-12-22 14:15:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179494418] [2020-12-22 14:15:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1967 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 14:15:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 14:15:29,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:29,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 14:15:29,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940501378] [2020-12-22 14:15:29,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 14:15:29,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:29,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 14:15:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:29,789 INFO L87 Difference]: Start difference. First operand 3603 states and 4549 transitions. Second operand 6 states. [2020-12-22 14:15:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:30,537 INFO L93 Difference]: Finished difference Result 7189 states and 9084 transitions. [2020-12-22 14:15:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 14:15:30,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2020-12-22 14:15:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:30,545 INFO L225 Difference]: With dead ends: 7189 [2020-12-22 14:15:30,545 INFO L226 Difference]: Without dead ends: 3607 [2020-12-22 14:15:30,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3607 states. [2020-12-22 14:15:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3607 to 3607. [2020-12-22 14:15:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3607 states. [2020-12-22 14:15:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 4553 transitions. [2020-12-22 14:15:31,192 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 4553 transitions. Word has length 188 [2020-12-22 14:15:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:31,192 INFO L481 AbstractCegarLoop]: Abstraction has 3607 states and 4553 transitions. [2020-12-22 14:15:31,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 14:15:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 4553 transitions. [2020-12-22 14:15:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 14:15:31,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:31,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:31,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:31,416 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash 787824277, now seen corresponding path program 2 times [2020-12-22 14:15:31,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:31,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795028723] [2020-12-22 14:15:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 14:15:31,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795028723] [2020-12-22 14:15:31,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514702976] [2020-12-22 14:15:31,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:32,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 14:15:32,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:15:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 14:15:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 14:15:33,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 14:15:33,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 14:15:33,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970883928] [2020-12-22 14:15:33,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:33,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:33,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:33,054 INFO L87 Difference]: Start difference. First operand 3607 states and 4553 transitions. Second operand 3 states. [2020-12-22 14:15:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:33,616 INFO L93 Difference]: Finished difference Result 7186 states and 9077 transitions. [2020-12-22 14:15:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:33,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2020-12-22 14:15:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:33,622 INFO L225 Difference]: With dead ends: 7186 [2020-12-22 14:15:33,623 INFO L226 Difference]: Without dead ends: 3609 [2020-12-22 14:15:33,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2020-12-22 14:15:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3609. [2020-12-22 14:15:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3609 states. [2020-12-22 14:15:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 4555 transitions. [2020-12-22 14:15:34,256 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 4555 transitions. Word has length 192 [2020-12-22 14:15:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:34,257 INFO L481 AbstractCegarLoop]: Abstraction has 3609 states and 4555 transitions. [2020-12-22 14:15:34,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 4555 transitions. [2020-12-22 14:15:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-22 14:15:34,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:34,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:34,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 14:15:34,478 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1713157909, now seen corresponding path program 1 times [2020-12-22 14:15:34,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:34,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963291403] [2020-12-22 14:15:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 14:15:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963291403] [2020-12-22 14:15:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681132590] [2020-12-22 14:15:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2003 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 14:15:36,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 14:15:36,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:36,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 14:15:36,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756252218] [2020-12-22 14:15:36,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 14:15:36,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 14:15:36,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-22 14:15:36,413 INFO L87 Difference]: Start difference. First operand 3609 states and 4555 transitions. Second operand 8 states. [2020-12-22 14:15:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:36,900 INFO L93 Difference]: Finished difference Result 7200 states and 9095 transitions. [2020-12-22 14:15:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 14:15:36,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 194 [2020-12-22 14:15:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:36,905 INFO L225 Difference]: With dead ends: 7200 [2020-12-22 14:15:36,905 INFO L226 Difference]: Without dead ends: 3613 [2020-12-22 14:15:36,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-22 14:15:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2020-12-22 14:15:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3613. [2020-12-22 14:15:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3613 states. [2020-12-22 14:15:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 4559 transitions. [2020-12-22 14:15:37,488 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 4559 transitions. Word has length 194 [2020-12-22 14:15:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:37,488 INFO L481 AbstractCegarLoop]: Abstraction has 3613 states and 4559 transitions. [2020-12-22 14:15:37,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 14:15:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 4559 transitions. [2020-12-22 14:15:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-22 14:15:37,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:37,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-12-22 14:15:37,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 14:15:37,708 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 719283163, now seen corresponding path program 2 times [2020-12-22 14:15:37,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:37,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416142024] [2020-12-22 14:15:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 14:15:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416142024] [2020-12-22 14:15:38,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154491641] [2020-12-22 14:15:38,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:41,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 14:15:41,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:15:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 2027 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 14:15:41,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 14:15:41,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:41,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2020-12-22 14:15:41,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149400449] [2020-12-22 14:15:41,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 14:15:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 14:15:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 14:15:41,271 INFO L87 Difference]: Start difference. First operand 3613 states and 4559 transitions. Second operand 8 states. [2020-12-22 14:15:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:41,794 INFO L93 Difference]: Finished difference Result 7209 states and 9106 transitions. [2020-12-22 14:15:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 14:15:41,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 198 [2020-12-22 14:15:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:41,798 INFO L225 Difference]: With dead ends: 7209 [2020-12-22 14:15:41,799 INFO L226 Difference]: Without dead ends: 3619 [2020-12-22 14:15:41,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-22 14:15:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2020-12-22 14:15:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3619. [2020-12-22 14:15:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3619 states. [2020-12-22 14:15:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 4565 transitions. [2020-12-22 14:15:42,274 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 4565 transitions. Word has length 198 [2020-12-22 14:15:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:42,275 INFO L481 AbstractCegarLoop]: Abstraction has 3619 states and 4565 transitions. [2020-12-22 14:15:42,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 14:15:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 4565 transitions. [2020-12-22 14:15:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-22 14:15:42,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:42,282 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:42,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:42,499 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1478358571, now seen corresponding path program 3 times [2020-12-22 14:15:42,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:42,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654874533] [2020-12-22 14:15:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 14:15:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654874533] [2020-12-22 14:15:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663234775] [2020-12-22 14:15:42,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:45,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 14:15:45,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:15:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 14:15:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 14:15:45,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:45,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-22 14:15:45,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634565829] [2020-12-22 14:15:45,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 14:15:45,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 14:15:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 14:15:45,541 INFO L87 Difference]: Start difference. First operand 3619 states and 4565 transitions. Second operand 10 states. [2020-12-22 14:15:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:46,157 INFO L93 Difference]: Finished difference Result 7220 states and 9117 transitions. [2020-12-22 14:15:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 14:15:46,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 204 [2020-12-22 14:15:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:46,163 INFO L225 Difference]: With dead ends: 7220 [2020-12-22 14:15:46,163 INFO L226 Difference]: Without dead ends: 3625 [2020-12-22 14:15:46,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-22 14:15:46,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2020-12-22 14:15:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 3625. [2020-12-22 14:15:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3625 states. [2020-12-22 14:15:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 4571 transitions. [2020-12-22 14:15:46,609 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 4571 transitions. Word has length 204 [2020-12-22 14:15:46,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:46,609 INFO L481 AbstractCegarLoop]: Abstraction has 3625 states and 4571 transitions. [2020-12-22 14:15:46,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 14:15:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 4571 transitions. [2020-12-22 14:15:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 14:15:46,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:46,614 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 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] [2020-12-22 14:15:46,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:46,828 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash -990018917, now seen corresponding path program 4 times [2020-12-22 14:15:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:46,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016890355] [2020-12-22 14:15:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-22 14:15:47,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016890355] [2020-12-22 14:15:47,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975865253] [2020-12-22 14:15:47,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:48,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 14:15:48,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:15:48,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 14:15:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-22 14:15:48,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:48,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 14:15:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156574271] [2020-12-22 14:15:48,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 14:15:48,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 14:15:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 14:15:48,906 INFO L87 Difference]: Start difference. First operand 3625 states and 4571 transitions. Second operand 14 states. [2020-12-22 14:15:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:49,479 INFO L93 Difference]: Finished difference Result 7229 states and 9124 transitions. [2020-12-22 14:15:49,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 14:15:49,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 210 [2020-12-22 14:15:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:49,485 INFO L225 Difference]: With dead ends: 7229 [2020-12-22 14:15:49,485 INFO L226 Difference]: Without dead ends: 3629 [2020-12-22 14:15:49,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 14:15:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2020-12-22 14:15:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3629. [2020-12-22 14:15:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2020-12-22 14:15:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4575 transitions. [2020-12-22 14:15:49,906 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4575 transitions. Word has length 210 [2020-12-22 14:15:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:49,907 INFO L481 AbstractCegarLoop]: Abstraction has 3629 states and 4575 transitions. [2020-12-22 14:15:49,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 14:15:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4575 transitions. [2020-12-22 14:15:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-22 14:15:49,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:49,911 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 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] [2020-12-22 14:15:50,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:50,113 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:50,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1185156843, now seen corresponding path program 5 times [2020-12-22 14:15:50,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:50,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955422392] [2020-12-22 14:15:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-12-22 14:15:50,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955422392] [2020-12-22 14:15:50,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976533263] [2020-12-22 14:15:50,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true