/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--pc87413_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 14:15:16,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 14:15:16,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 14:15:16,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 14:15:16,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 14:15:16,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 14:15:16,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 14:15:16,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 14:15:16,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 14:15:16,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 14:15:16,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 14:15:16,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 14:15:16,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 14:15:16,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 14:15:16,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 14:15:16,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 14:15:16,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 14:15:16,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 14:15:16,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 14:15:16,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 14:15:16,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 14:15:16,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 14:15:16,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 14:15:16,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 14:15:16,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 14:15:16,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 14:15:16,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 14:15:16,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 14:15:16,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 14:15:16,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 14:15:16,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 14:15:16,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 14:15:16,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 14:15:16,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 14:15:16,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 14:15:16,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 14:15:16,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 14:15:16,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 14:15:16,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 14:15:16,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 14:15:16,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 14:15:16,501 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 14:15:16,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 14:15:16,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 14:15:16,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 14:15:16,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 14:15:16,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 14:15:16,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 14:15:16,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 14:15:16,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 14:15:16,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 14:15:16,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 14:15:16,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 14:15:16,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 14:15:16,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 14:15:16,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 14:15:16,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 14:15:16,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 14:15:16,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 14:15:16,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 14:15:16,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 14:15:16,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 14:15:16,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 14:15:16,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 14:15:16,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 14:15:16,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 14:15:16,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 14:15:16,957 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 14:15:16,958 INFO L432 ainManager$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--pc87413_wdt.ko-entry_point.cil.out.i [2020-12-22 14:15:17,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b53e4b7/5233ef3bc9804de58f3e1673783dc52f/FLAG5d360c7ea [2020-12-22 14:15:17,963 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 14:15:17,967 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--pc87413_wdt.ko-entry_point.cil.out.i [2020-12-22 14:15:18,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b53e4b7/5233ef3bc9804de58f3e1673783dc52f/FLAG5d360c7ea [2020-12-22 14:15:18,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b53e4b7/5233ef3bc9804de58f3e1673783dc52f [2020-12-22 14:15:18,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 14:15:18,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 14:15:18,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 14:15:18,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 14:15:18,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 14:15:18,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:15:18" (1/1) ... [2020-12-22 14:15:18,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62749ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:18, skipping insertion in model container [2020-12-22 14:15:18,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:15:18" (1/1) ... [2020-12-22 14:15:18,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 14:15:18,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 14:15:19,699 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--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2020-12-22 14:15:19,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 14:15:19,799 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 14:15:19,968 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--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2020-12-22 14:15:19,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 14:15:20,067 INFO L208 MainTranslator]: Completed translation [2020-12-22 14:15:20,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20 WrapperNode [2020-12-22 14:15:20,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 14:15:20,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 14:15:20,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 14:15:20,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 14:15:20,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 14:15:20,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 14:15:20,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 14:15:20,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 14:15:20,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (1/1) ... [2020-12-22 14:15:20,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 14:15:20,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 14:15:20,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 14:15:20,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 14:15:20,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (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 14:15:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 14:15:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 14:15:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 14:15:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 14:15:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 14:15:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 14:15:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 14:15:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 14:15:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 14:15:20,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 14:15:20,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 14:15:25,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 14:15:25,397 INFO L299 CfgBuilder]: Removed 1175 assume(true) statements. [2020-12-22 14:15:25,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:15:25 BoogieIcfgContainer [2020-12-22 14:15:25,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 14:15:25,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 14:15:25,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 14:15:25,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 14:15:25,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:15:18" (1/3) ... [2020-12-22 14:15:25,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd5386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:15:25, skipping insertion in model container [2020-12-22 14:15:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:15:20" (2/3) ... [2020-12-22 14:15:25,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd5386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:15:25, skipping insertion in model container [2020-12-22 14:15:25,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:15:25" (3/3) ... [2020-12-22 14:15:25,414 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2020-12-22 14:15:25,422 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 14:15:25,428 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 14:15:25,453 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 14:15:25,505 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 14:15:25,505 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 14:15:25,505 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 14:15:25,505 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 14:15:25,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 14:15:25,506 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 14:15:25,506 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 14:15:25,506 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 14:15:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states. [2020-12-22 14:15:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 14:15:25,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:25,566 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] [2020-12-22 14:15:25,567 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash -292241257, now seen corresponding path program 1 times [2020-12-22 14:15:25,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:25,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461532581] [2020-12-22 14:15:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:26,110 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 14:15:26,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461532581] [2020-12-22 14:15:26,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:26,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 14:15:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410752364] [2020-12-22 14:15:26,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 14:15:26,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 14:15:26,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 14:15:26,140 INFO L87 Difference]: Start difference. First operand 531 states. Second operand 2 states. [2020-12-22 14:15:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:26,243 INFO L93 Difference]: Finished difference Result 1058 states and 1255 transitions. [2020-12-22 14:15:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 14:15:26,244 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 52 [2020-12-22 14:15:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:26,265 INFO L225 Difference]: With dead ends: 1058 [2020-12-22 14:15:26,265 INFO L226 Difference]: Without dead ends: 523 [2020-12-22 14:15:26,273 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 14:15:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-12-22 14:15:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2020-12-22 14:15:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-12-22 14:15:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 607 transitions. [2020-12-22 14:15:26,361 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 607 transitions. Word has length 52 [2020-12-22 14:15:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:26,362 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 607 transitions. [2020-12-22 14:15:26,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 14:15:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 607 transitions. [2020-12-22 14:15:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 14:15:26,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:26,366 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] [2020-12-22 14:15:26,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 14:15:26,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:26,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1668904607, now seen corresponding path program 1 times [2020-12-22 14:15:26,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:26,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950219423] [2020-12-22 14:15:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:26,639 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 14:15:26,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950219423] [2020-12-22 14:15:26,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:26,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:26,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938271163] [2020-12-22 14:15:26,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:26,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:26,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:26,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:26,643 INFO L87 Difference]: Start difference. First operand 523 states and 607 transitions. Second operand 3 states. [2020-12-22 14:15:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:26,881 INFO L93 Difference]: Finished difference Result 1376 states and 1609 transitions. [2020-12-22 14:15:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:26,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 14:15:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:26,888 INFO L225 Difference]: With dead ends: 1376 [2020-12-22 14:15:26,888 INFO L226 Difference]: Without dead ends: 890 [2020-12-22 14:15:26,891 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 14:15:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-12-22 14:15:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2020-12-22 14:15:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-12-22 14:15:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1042 transitions. [2020-12-22 14:15:26,955 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1042 transitions. Word has length 52 [2020-12-22 14:15:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:26,957 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1042 transitions. [2020-12-22 14:15:26,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1042 transitions. [2020-12-22 14:15:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 14:15:26,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:26,968 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] [2020-12-22 14:15:26,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 14:15:26,969 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1879376752, now seen corresponding path program 1 times [2020-12-22 14:15:26,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:26,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904862546] [2020-12-22 14:15:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:27,220 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 14:15:27,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904862546] [2020-12-22 14:15:27,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:27,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:27,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264197329] [2020-12-22 14:15:27,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:27,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:27,227 INFO L87 Difference]: Start difference. First operand 890 states and 1042 transitions. Second operand 3 states. [2020-12-22 14:15:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:27,289 INFO L93 Difference]: Finished difference Result 896 states and 1046 transitions. [2020-12-22 14:15:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:27,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 14:15:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:27,302 INFO L225 Difference]: With dead ends: 896 [2020-12-22 14:15:27,303 INFO L226 Difference]: Without dead ends: 893 [2020-12-22 14:15:27,311 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 14:15:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-12-22 14:15:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 890. [2020-12-22 14:15:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-12-22 14:15:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1041 transitions. [2020-12-22 14:15:27,355 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1041 transitions. Word has length 53 [2020-12-22 14:15:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:27,356 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1041 transitions. [2020-12-22 14:15:27,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1041 transitions. [2020-12-22 14:15:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 14:15:27,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:27,359 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] [2020-12-22 14:15:27,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 14:15:27,359 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:27,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1879436334, now seen corresponding path program 1 times [2020-12-22 14:15:27,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:27,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102994365] [2020-12-22 14:15:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:27,555 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 14:15:27,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102994365] [2020-12-22 14:15:27,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:27,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 14:15:27,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289797850] [2020-12-22 14:15:27,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:27,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:27,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:27,559 INFO L87 Difference]: Start difference. First operand 890 states and 1041 transitions. Second operand 3 states. [2020-12-22 14:15:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:27,639 INFO L93 Difference]: Finished difference Result 1743 states and 2039 transitions. [2020-12-22 14:15:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:27,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 14:15:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:27,651 INFO L225 Difference]: With dead ends: 1743 [2020-12-22 14:15:27,652 INFO L226 Difference]: Without dead ends: 1716 [2020-12-22 14:15:27,653 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 14:15:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2020-12-22 14:15:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1716. [2020-12-22 14:15:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2020-12-22 14:15:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2010 transitions. [2020-12-22 14:15:27,732 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2010 transitions. Word has length 53 [2020-12-22 14:15:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:27,733 INFO L481 AbstractCegarLoop]: Abstraction has 1716 states and 2010 transitions. [2020-12-22 14:15:27,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2010 transitions. [2020-12-22 14:15:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 14:15:27,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:27,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:27,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 14:15:27,739 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:27,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1513527943, now seen corresponding path program 1 times [2020-12-22 14:15:27,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:27,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120438352] [2020-12-22 14:15:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:27,942 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 14:15:27,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120438352] [2020-12-22 14:15:27,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:27,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:27,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566218634] [2020-12-22 14:15:27,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:27,947 INFO L87 Difference]: Start difference. First operand 1716 states and 2010 transitions. Second operand 3 states. [2020-12-22 14:15:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:30,125 INFO L93 Difference]: Finished difference Result 3604 states and 4240 transitions. [2020-12-22 14:15:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:30,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 14:15:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:30,137 INFO L225 Difference]: With dead ends: 3604 [2020-12-22 14:15:30,137 INFO L226 Difference]: Without dead ends: 1925 [2020-12-22 14:15:30,141 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 14:15:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2020-12-22 14:15:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1894. [2020-12-22 14:15:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2020-12-22 14:15:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2236 transitions. [2020-12-22 14:15:30,225 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2236 transitions. Word has length 100 [2020-12-22 14:15:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:30,226 INFO L481 AbstractCegarLoop]: Abstraction has 1894 states and 2236 transitions. [2020-12-22 14:15:30,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2236 transitions. [2020-12-22 14:15:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 14:15:30,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:30,236 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] [2020-12-22 14:15:30,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 14:15:30,236 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1292321500, now seen corresponding path program 1 times [2020-12-22 14:15:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:30,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042976935] [2020-12-22 14:15:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:30,519 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 14:15:30,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042976935] [2020-12-22 14:15:30,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903347725] [2020-12-22 14:15:30,520 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 14:15:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 14:15:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:31,416 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 14:15:31,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 14:15:31,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-12-22 14:15:31,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223184802] [2020-12-22 14:15:31,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 14:15:31,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:31,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 14:15:31,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 14:15:31,423 INFO L87 Difference]: Start difference. First operand 1894 states and 2236 transitions. Second operand 4 states. [2020-12-22 14:15:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:31,955 INFO L93 Difference]: Finished difference Result 5587 states and 6599 transitions. [2020-12-22 14:15:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 14:15:31,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 14:15:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:31,985 INFO L225 Difference]: With dead ends: 5587 [2020-12-22 14:15:31,986 INFO L226 Difference]: Without dead ends: 5560 [2020-12-22 14:15:31,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 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 14:15:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-12-22 14:15:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5358. [2020-12-22 14:15:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5358 states. [2020-12-22 14:15:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5358 states to 5358 states and 6366 transitions. [2020-12-22 14:15:32,243 INFO L78 Accepts]: Start accepts. Automaton has 5358 states and 6366 transitions. Word has length 131 [2020-12-22 14:15:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:32,243 INFO L481 AbstractCegarLoop]: Abstraction has 5358 states and 6366 transitions. [2020-12-22 14:15:32,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 14:15:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5358 states and 6366 transitions. [2020-12-22 14:15:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 14:15:32,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:32,253 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] [2020-12-22 14:15:32,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 14:15:32,467 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:32,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:32,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1981577442, now seen corresponding path program 1 times [2020-12-22 14:15:32,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:32,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606612880] [2020-12-22 14:15:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:32,688 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 14:15:32,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606612880] [2020-12-22 14:15:32,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:32,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 14:15:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967020809] [2020-12-22 14:15:32,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 14:15:32,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 14:15:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 14:15:32,691 INFO L87 Difference]: Start difference. First operand 5358 states and 6366 transitions. Second operand 5 states. [2020-12-22 14:15:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:33,854 INFO L93 Difference]: Finished difference Result 26537 states and 31489 transitions. [2020-12-22 14:15:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 14:15:33,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-12-22 14:15:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:33,959 INFO L225 Difference]: With dead ends: 26537 [2020-12-22 14:15:33,959 INFO L226 Difference]: Without dead ends: 21216 [2020-12-22 14:15:33,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 14:15:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21216 states. [2020-12-22 14:15:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21216 to 5242. [2020-12-22 14:15:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5242 states. [2020-12-22 14:15:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5242 states to 5242 states and 6242 transitions. [2020-12-22 14:15:34,465 INFO L78 Accepts]: Start accepts. Automaton has 5242 states and 6242 transitions. Word has length 131 [2020-12-22 14:15:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:34,465 INFO L481 AbstractCegarLoop]: Abstraction has 5242 states and 6242 transitions. [2020-12-22 14:15:34,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 14:15:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5242 states and 6242 transitions. [2020-12-22 14:15:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 14:15:34,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:34,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 14:15:34,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 14:15:34,474 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 275740233, now seen corresponding path program 1 times [2020-12-22 14:15:34,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:34,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612229492] [2020-12-22 14:15:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612229492] [2020-12-22 14:15:34,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:34,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326046082] [2020-12-22 14:15:34,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:34,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:34,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:34,776 INFO L87 Difference]: Start difference. First operand 5242 states and 6242 transitions. Second operand 3 states. [2020-12-22 14:15:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:35,400 INFO L93 Difference]: Finished difference Result 10447 states and 12441 transitions. [2020-12-22 14:15:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:35,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 14:15:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:35,416 INFO L225 Difference]: With dead ends: 10447 [2020-12-22 14:15:35,416 INFO L226 Difference]: Without dead ends: 5086 [2020-12-22 14:15:35,427 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 14:15:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2020-12-22 14:15:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 5047. [2020-12-22 14:15:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5047 states. [2020-12-22 14:15:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5047 states to 5047 states and 5969 transitions. [2020-12-22 14:15:35,885 INFO L78 Accepts]: Start accepts. Automaton has 5047 states and 5969 transitions. Word has length 132 [2020-12-22 14:15:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:35,885 INFO L481 AbstractCegarLoop]: Abstraction has 5047 states and 5969 transitions. [2020-12-22 14:15:35,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5047 states and 5969 transitions. [2020-12-22 14:15:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 14:15:35,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:35,893 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] [2020-12-22 14:15:35,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 14:15:35,894 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:35,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1410439605, now seen corresponding path program 1 times [2020-12-22 14:15:35,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:35,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102618580] [2020-12-22 14:15:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 14:15:36,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102618580] [2020-12-22 14:15:36,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:36,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:36,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741113156] [2020-12-22 14:15:36,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:36,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:36,038 INFO L87 Difference]: Start difference. First operand 5047 states and 5969 transitions. Second operand 3 states. [2020-12-22 14:15:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:36,364 INFO L93 Difference]: Finished difference Result 7290 states and 8632 transitions. [2020-12-22 14:15:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:36,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 14:15:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:36,370 INFO L225 Difference]: With dead ends: 7290 [2020-12-22 14:15:36,370 INFO L226 Difference]: Without dead ends: 2270 [2020-12-22 14:15:36,378 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 14:15:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2020-12-22 14:15:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2270. [2020-12-22 14:15:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2270 states. [2020-12-22 14:15:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 2693 transitions. [2020-12-22 14:15:36,604 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 2693 transitions. Word has length 132 [2020-12-22 14:15:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:36,604 INFO L481 AbstractCegarLoop]: Abstraction has 2270 states and 2693 transitions. [2020-12-22 14:15:36,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 2693 transitions. [2020-12-22 14:15:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 14:15:36,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:36,611 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 14:15:36,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 14:15:36,611 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:36,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1635296256, now seen corresponding path program 1 times [2020-12-22 14:15:36,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:36,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128785568] [2020-12-22 14:15:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 14:15:36,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128785568] [2020-12-22 14:15:36,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:36,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 14:15:36,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725134651] [2020-12-22 14:15:36,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:36,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:36,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:36,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:36,833 INFO L87 Difference]: Start difference. First operand 2270 states and 2693 transitions. Second operand 3 states. [2020-12-22 14:15:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:37,133 INFO L93 Difference]: Finished difference Result 6408 states and 7639 transitions. [2020-12-22 14:15:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:37,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 14:15:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:37,142 INFO L225 Difference]: With dead ends: 6408 [2020-12-22 14:15:37,143 INFO L226 Difference]: Without dead ends: 4303 [2020-12-22 14:15:37,147 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 14:15:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4303 states. [2020-12-22 14:15:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4303 to 4118. [2020-12-22 14:15:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4118 states. [2020-12-22 14:15:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 4931 transitions. [2020-12-22 14:15:37,420 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 4931 transitions. Word has length 160 [2020-12-22 14:15:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:37,420 INFO L481 AbstractCegarLoop]: Abstraction has 4118 states and 4931 transitions. [2020-12-22 14:15:37,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 4931 transitions. [2020-12-22 14:15:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 14:15:37,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:37,431 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 14:15:37,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 14:15:37,431 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:37,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1756946129, now seen corresponding path program 1 times [2020-12-22 14:15:37,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:37,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79543447] [2020-12-22 14:15:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 14:15:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79543447] [2020-12-22 14:15:37,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:37,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 14:15:37,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609664913] [2020-12-22 14:15:37,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 14:15:37,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 14:15:37,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 14:15:37,749 INFO L87 Difference]: Start difference. First operand 4118 states and 4931 transitions. Second operand 5 states. [2020-12-22 14:15:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:38,548 INFO L93 Difference]: Finished difference Result 12139 states and 14543 transitions. [2020-12-22 14:15:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 14:15:38,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-12-22 14:15:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:38,569 INFO L225 Difference]: With dead ends: 12139 [2020-12-22 14:15:38,569 INFO L226 Difference]: Without dead ends: 8099 [2020-12-22 14:15:38,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 14:15:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2020-12-22 14:15:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 4118. [2020-12-22 14:15:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4118 states. [2020-12-22 14:15:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 4930 transitions. [2020-12-22 14:15:39,014 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 4930 transitions. Word has length 171 [2020-12-22 14:15:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:39,015 INFO L481 AbstractCegarLoop]: Abstraction has 4118 states and 4930 transitions. [2020-12-22 14:15:39,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 14:15:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 4930 transitions. [2020-12-22 14:15:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 14:15:39,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:39,024 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 14:15:39,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 14:15:39,024 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:39,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1882887501, now seen corresponding path program 1 times [2020-12-22 14:15:39,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:39,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634849857] [2020-12-22 14:15:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 14:15:39,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634849857] [2020-12-22 14:15:39,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:39,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 14:15:39,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004265564] [2020-12-22 14:15:39,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:39,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 14:15:39,495 INFO L87 Difference]: Start difference. First operand 4118 states and 4930 transitions. Second operand 3 states. [2020-12-22 14:15:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:39,938 INFO L93 Difference]: Finished difference Result 8220 states and 9847 transitions. [2020-12-22 14:15:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:39,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2020-12-22 14:15:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:39,948 INFO L225 Difference]: With dead ends: 8220 [2020-12-22 14:15:39,948 INFO L226 Difference]: Without dead ends: 4122 [2020-12-22 14:15:39,955 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 14:15:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2020-12-22 14:15:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 4122. [2020-12-22 14:15:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4122 states. [2020-12-22 14:15:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 4934 transitions. [2020-12-22 14:15:40,358 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 4934 transitions. Word has length 173 [2020-12-22 14:15:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:40,359 INFO L481 AbstractCegarLoop]: Abstraction has 4122 states and 4934 transitions. [2020-12-22 14:15:40,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 4934 transitions. [2020-12-22 14:15:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-22 14:15:40,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:40,369 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 14:15:40,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 14:15:40,369 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:40,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1725654031, now seen corresponding path program 1 times [2020-12-22 14:15:40,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:40,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351042411] [2020-12-22 14:15:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 14:15:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351042411] [2020-12-22 14:15:40,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667277528] [2020-12-22 14:15:40,811 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 14:15:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:41,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 14:15:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 14:15:41,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 14:15:41,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-12-22 14:15:41,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671136990] [2020-12-22 14:15:41,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 14:15:41,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 14:15:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 14:15:41,705 INFO L87 Difference]: Start difference. First operand 4122 states and 4934 transitions. Second operand 5 states. [2020-12-22 14:15:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:42,207 INFO L93 Difference]: Finished difference Result 8090 states and 9696 transitions. [2020-12-22 14:15:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 14:15:42,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2020-12-22 14:15:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:42,218 INFO L225 Difference]: With dead ends: 8090 [2020-12-22 14:15:42,218 INFO L226 Difference]: Without dead ends: 4131 [2020-12-22 14:15:42,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 14:15:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2020-12-22 14:15:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4119. [2020-12-22 14:15:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4119 states. [2020-12-22 14:15:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 4930 transitions. [2020-12-22 14:15:42,536 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 4930 transitions. Word has length 177 [2020-12-22 14:15:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:42,537 INFO L481 AbstractCegarLoop]: Abstraction has 4119 states and 4930 transitions. [2020-12-22 14:15:42,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 14:15:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 4930 transitions. [2020-12-22 14:15:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 14:15:42,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:42,547 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:42,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 14:15:42,763 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1599541828, now seen corresponding path program 1 times [2020-12-22 14:15:42,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:42,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877423236] [2020-12-22 14:15:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 14:15:43,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877423236] [2020-12-22 14:15:43,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 14:15:43,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 14:15:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133526172] [2020-12-22 14:15:43,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 14:15:43,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:43,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 14:15:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 14:15:43,174 INFO L87 Difference]: Start difference. First operand 4119 states and 4930 transitions. Second operand 5 states. [2020-12-22 14:15:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:43,642 INFO L93 Difference]: Finished difference Result 8100 states and 9705 transitions. [2020-12-22 14:15:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 14:15:43,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 235 [2020-12-22 14:15:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:43,659 INFO L225 Difference]: With dead ends: 8100 [2020-12-22 14:15:43,660 INFO L226 Difference]: Without dead ends: 4119 [2020-12-22 14:15:43,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 14:15:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2020-12-22 14:15:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 4119. [2020-12-22 14:15:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4119 states. [2020-12-22 14:15:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 4929 transitions. [2020-12-22 14:15:43,968 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 4929 transitions. Word has length 235 [2020-12-22 14:15:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:43,968 INFO L481 AbstractCegarLoop]: Abstraction has 4119 states and 4929 transitions. [2020-12-22 14:15:43,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 14:15:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 4929 transitions. [2020-12-22 14:15:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 14:15:43,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:43,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:43,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 14:15:43,978 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:43,979 INFO L82 PathProgramCache]: Analyzing trace with hash -850421976, now seen corresponding path program 1 times [2020-12-22 14:15:43,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:43,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026187620] [2020-12-22 14:15:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 14:15:44,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026187620] [2020-12-22 14:15:44,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65791376] [2020-12-22 14:15:44,535 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 14:15:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:45,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2484 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 14:15:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 14:15:46,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:46,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 14:15:46,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764025922] [2020-12-22 14:15:46,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 14:15:46,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 14:15:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:46,091 INFO L87 Difference]: Start difference. First operand 4119 states and 4929 transitions. Second operand 6 states. [2020-12-22 14:15:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:46,560 INFO L93 Difference]: Finished difference Result 8221 states and 9844 transitions. [2020-12-22 14:15:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 14:15:46,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 237 [2020-12-22 14:15:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:46,570 INFO L225 Difference]: With dead ends: 8221 [2020-12-22 14:15:46,570 INFO L226 Difference]: Without dead ends: 4123 [2020-12-22 14:15:46,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 236 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 14:15:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2020-12-22 14:15:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 4123. [2020-12-22 14:15:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4123 states. [2020-12-22 14:15:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 4933 transitions. [2020-12-22 14:15:46,929 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 4933 transitions. Word has length 237 [2020-12-22 14:15:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:46,929 INFO L481 AbstractCegarLoop]: Abstraction has 4123 states and 4933 transitions. [2020-12-22 14:15:46,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 14:15:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 4933 transitions. [2020-12-22 14:15:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 14:15:46,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:46,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:47,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 14:15:47,153 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash -529309910, now seen corresponding path program 2 times [2020-12-22 14:15:47,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:47,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755246385] [2020-12-22 14:15:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 14:15:47,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755246385] [2020-12-22 14:15:47,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063700177] [2020-12-22 14:15:47,639 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 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 14:15:48,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 14:15:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:15:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 14:15:48,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 14:15:48,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 14:15:48,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 14:15:48,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369332705] [2020-12-22 14:15:48,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 14:15:48,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 14:15:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 14:15:48,630 INFO L87 Difference]: Start difference. First operand 4123 states and 4933 transitions. Second operand 3 states. [2020-12-22 14:15:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:49,033 INFO L93 Difference]: Finished difference Result 8218 states and 9837 transitions. [2020-12-22 14:15:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 14:15:49,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-12-22 14:15:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:49,044 INFO L225 Difference]: With dead ends: 8218 [2020-12-22 14:15:49,044 INFO L226 Difference]: Without dead ends: 4125 [2020-12-22 14:15:49,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 241 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 14:15:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2020-12-22 14:15:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 4125. [2020-12-22 14:15:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4125 states. [2020-12-22 14:15:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4125 states to 4125 states and 4935 transitions. [2020-12-22 14:15:49,359 INFO L78 Accepts]: Start accepts. Automaton has 4125 states and 4935 transitions. Word has length 241 [2020-12-22 14:15:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:49,359 INFO L481 AbstractCegarLoop]: Abstraction has 4125 states and 4935 transitions. [2020-12-22 14:15:49,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 14:15:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4125 states and 4935 transitions. [2020-12-22 14:15:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-12-22 14:15:49,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:49,366 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:49,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:49,580 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash 853407402, now seen corresponding path program 1 times [2020-12-22 14:15:49,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:49,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425651673] [2020-12-22 14:15:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 14:15:49,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425651673] [2020-12-22 14:15:49,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10464718] [2020-12-22 14:15:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:15:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 2520 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 14:15:51,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 14:15:51,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:51,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 14:15:51,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936416946] [2020-12-22 14:15:51,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 14:15:51,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:51,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 14:15:51,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 14:15:51,929 INFO L87 Difference]: Start difference. First operand 4125 states and 4935 transitions. Second operand 8 states. [2020-12-22 14:15:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:52,473 INFO L93 Difference]: Finished difference Result 8232 states and 9855 transitions. [2020-12-22 14:15:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 14:15:52,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 243 [2020-12-22 14:15:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:52,485 INFO L225 Difference]: With dead ends: 8232 [2020-12-22 14:15:52,485 INFO L226 Difference]: Without dead ends: 4129 [2020-12-22 14:15:52,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 14:15:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2020-12-22 14:15:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4129. [2020-12-22 14:15:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4129 states. [2020-12-22 14:15:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 4939 transitions. [2020-12-22 14:15:52,753 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 4939 transitions. Word has length 243 [2020-12-22 14:15:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:52,754 INFO L481 AbstractCegarLoop]: Abstraction has 4129 states and 4939 transitions. [2020-12-22 14:15:52,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 14:15:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 4939 transitions. [2020-12-22 14:15:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-22 14:15:52,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:52,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:52,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 14:15:52,977 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:52,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1221638492, now seen corresponding path program 2 times [2020-12-22 14:15:52,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:52,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557709061] [2020-12-22 14:15:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 14:15:53,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557709061] [2020-12-22 14:15:53,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321421754] [2020-12-22 14:15:53,558 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 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 14:15:55,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 14:15:55,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:15:55,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 2544 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 14:15:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 14:15:55,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:55,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 14:15:55,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250952309] [2020-12-22 14:15:55,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 14:15:55,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 14:15:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 14:15:55,682 INFO L87 Difference]: Start difference. First operand 4129 states and 4939 transitions. Second operand 10 states. [2020-12-22 14:15:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:56,137 INFO L93 Difference]: Finished difference Result 8239 states and 9862 transitions. [2020-12-22 14:15:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 14:15:56,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 247 [2020-12-22 14:15:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:56,149 INFO L225 Difference]: With dead ends: 8239 [2020-12-22 14:15:56,150 INFO L226 Difference]: Without dead ends: 4133 [2020-12-22 14:15:56,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 14:15:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2020-12-22 14:15:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4133. [2020-12-22 14:15:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4133 states. [2020-12-22 14:15:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 4943 transitions. [2020-12-22 14:15:56,457 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 4943 transitions. Word has length 247 [2020-12-22 14:15:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:56,457 INFO L481 AbstractCegarLoop]: Abstraction has 4133 states and 4943 transitions. [2020-12-22 14:15:56,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 14:15:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 4943 transitions. [2020-12-22 14:15:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 14:15:56,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:56,464 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:56,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 14:15:56,678 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:56,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1370638186, now seen corresponding path program 3 times [2020-12-22 14:15:56,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:56,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614061187] [2020-12-22 14:15:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:15:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:15:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-22 14:15:57,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614061187] [2020-12-22 14:15:57,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897641958] [2020-12-22 14:15:57,270 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 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 14:15:58,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 14:15:58,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:15:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 14:15:58,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:15:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-12-22 14:15:58,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:15:58,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-12-22 14:15:58,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226516040] [2020-12-22 14:15:58,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 14:15:58,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:15:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 14:15:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 14:15:58,853 INFO L87 Difference]: Start difference. First operand 4133 states and 4943 transitions. Second operand 9 states. [2020-12-22 14:15:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:15:59,419 INFO L93 Difference]: Finished difference Result 8248 states and 9873 transitions. [2020-12-22 14:15:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 14:15:59,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 251 [2020-12-22 14:15:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:15:59,428 INFO L225 Difference]: With dead ends: 8248 [2020-12-22 14:15:59,428 INFO L226 Difference]: Without dead ends: 4139 [2020-12-22 14:15:59,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 14:15:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2020-12-22 14:15:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 4139. [2020-12-22 14:15:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-12-22 14:15:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 4949 transitions. [2020-12-22 14:15:59,707 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 4949 transitions. Word has length 251 [2020-12-22 14:15:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:15:59,707 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 4949 transitions. [2020-12-22 14:15:59,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 14:15:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 4949 transitions. [2020-12-22 14:15:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-12-22 14:15:59,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:15:59,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:15:59,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:15:59,927 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:15:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:15:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash 666642344, now seen corresponding path program 4 times [2020-12-22 14:15:59,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:15:59,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961213633] [2020-12-22 14:15:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:16:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:16:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-22 14:16:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961213633] [2020-12-22 14:16:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857378928] [2020-12-22 14:16:00,592 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 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 14:16:02,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 14:16:02,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:16:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 14:16:02,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:16:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-22 14:16:02,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:16:02,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 14:16:02,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612843159] [2020-12-22 14:16:02,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 14:16:02,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:16:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 14:16:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 14:16:02,933 INFO L87 Difference]: Start difference. First operand 4139 states and 4949 transitions. Second operand 14 states. [2020-12-22 14:16:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:16:03,415 INFO L93 Difference]: Finished difference Result 8257 states and 9880 transitions. [2020-12-22 14:16:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 14:16:03,416 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 257 [2020-12-22 14:16:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:16:03,423 INFO L225 Difference]: With dead ends: 8257 [2020-12-22 14:16:03,423 INFO L226 Difference]: Without dead ends: 4143 [2020-12-22 14:16:03,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 14:16:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2020-12-22 14:16:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4143. [2020-12-22 14:16:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4143 states. [2020-12-22 14:16:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 4953 transitions. [2020-12-22 14:16:03,676 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 4953 transitions. Word has length 257 [2020-12-22 14:16:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:16:03,676 INFO L481 AbstractCegarLoop]: Abstraction has 4143 states and 4953 transitions. [2020-12-22 14:16:03,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 14:16:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 4953 transitions. [2020-12-22 14:16:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 14:16:03,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:16:03,681 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:16:03,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:16:03,882 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:16:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:16:03,884 INFO L82 PathProgramCache]: Analyzing trace with hash -41049046, now seen corresponding path program 5 times [2020-12-22 14:16:03,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:16:03,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887800275] [2020-12-22 14:16:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:16:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:16:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-22 14:16:04,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887800275] [2020-12-22 14:16:04,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892964078] [2020-12-22 14:16:04,592 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 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