/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/product-lines/email_spec27_product33.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:30:01,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:30:01,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:30:01,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:30:01,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:30:01,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:30:01,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:30:01,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:30:01,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:30:01,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:30:01,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:30:01,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:30:01,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:30:01,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:30:01,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:30:01,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:30:01,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:30:01,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:30:01,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:30:01,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:30:01,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:30:01,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:30:01,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:30:01,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:30:01,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:30:01,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:30:01,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:30:01,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:30:01,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:30:01,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:30:01,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:30:01,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:30:01,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:30:01,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:30:01,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:30:01,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:30:01,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:30:01,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:30:01,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:30:01,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:30:01,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:30:01,434 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:30:01,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:30:01,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:30:01,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:30:01,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:30:01,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:30:01,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:30:01,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:30:01,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:30:01,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:30:01,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:30:01,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:30:01,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:30:01,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:30:01,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:30:01,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:30:01,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:30:01,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:30:01,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:30:01,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:30:01,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:30:01,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:30:01,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:30:01,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:30:01,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:30:01,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:30:01,881 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:30:01,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec27_product33.cil.c [2020-12-22 06:30:01,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cb90cbd/a4ec93a8acaf4bfc82f10bcb648d2768/FLAGbbcf31acc [2020-12-22 06:30:02,744 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:30:02,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product33.cil.c [2020-12-22 06:30:02,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cb90cbd/a4ec93a8acaf4bfc82f10bcb648d2768/FLAGbbcf31acc [2020-12-22 06:30:02,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cb90cbd/a4ec93a8acaf4bfc82f10bcb648d2768 [2020-12-22 06:30:02,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:30:02,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:30:02,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:30:02,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:30:02,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:30:02,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:30:02" (1/1) ... [2020-12-22 06:30:02,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c36be30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:02, skipping insertion in model container [2020-12-22 06:30:02,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:30:02" (1/1) ... [2020-12-22 06:30:02,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:30:03,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:30:03,278 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/product-lines/email_spec27_product33.cil.c[1219,1232] [2020-12-22 06:30:03,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:30:03,875 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:30:03,900 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/product-lines/email_spec27_product33.cil.c[1219,1232] [2020-12-22 06:30:03,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:30:04,093 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:30:04,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04 WrapperNode [2020-12-22 06:30:04,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:30:04,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:30:04,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:30:04,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:30:04,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:30:04,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:30:04,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:30:04,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:30:04,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (1/1) ... [2020-12-22 06:30:04,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:30:04,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:30:04,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:30:04,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:30:04,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (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 06:30:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:30:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:30:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:30:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:30:04,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:30:07,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:30:07,657 INFO L299 CfgBuilder]: Removed 407 assume(true) statements. [2020-12-22 06:30:07,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:30:07 BoogieIcfgContainer [2020-12-22 06:30:07,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:30:07,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:30:07,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:30:07,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:30:07,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:30:02" (1/3) ... [2020-12-22 06:30:07,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ad97b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:30:07, skipping insertion in model container [2020-12-22 06:30:07,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:30:04" (2/3) ... [2020-12-22 06:30:07,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ad97b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:30:07, skipping insertion in model container [2020-12-22 06:30:07,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:30:07" (3/3) ... [2020-12-22 06:30:07,670 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product33.cil.c [2020-12-22 06:30:07,677 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:30:07,683 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:30:07,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:30:07,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:30:07,735 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:30:07,735 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:30:07,736 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:30:07,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:30:07,736 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:30:07,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:30:07,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:30:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states. [2020-12-22 06:30:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:30:07,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:07,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:07,783 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:07,790 INFO L82 PathProgramCache]: Analyzing trace with hash -418317132, now seen corresponding path program 1 times [2020-12-22 06:30:07,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:07,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043131625] [2020-12-22 06:30:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:08,356 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 06:30:08,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043131625] [2020-12-22 06:30:08,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:08,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:08,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946877051] [2020-12-22 06:30:08,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:08,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:08,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:08,386 INFO L87 Difference]: Start difference. First operand 613 states. Second operand 3 states. [2020-12-22 06:30:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:08,563 INFO L93 Difference]: Finished difference Result 1804 states and 3125 transitions. [2020-12-22 06:30:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:08,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:30:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:08,606 INFO L225 Difference]: With dead ends: 1804 [2020-12-22 06:30:08,607 INFO L226 Difference]: Without dead ends: 1086 [2020-12-22 06:30:08,621 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 06:30:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2020-12-22 06:30:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 552. [2020-12-22 06:30:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-12-22 06:30:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 957 transitions. [2020-12-22 06:30:08,747 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 957 transitions. Word has length 62 [2020-12-22 06:30:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:08,747 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 957 transitions. [2020-12-22 06:30:08,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 957 transitions. [2020-12-22 06:30:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:30:08,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:08,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:08,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:30:08,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash 571959111, now seen corresponding path program 1 times [2020-12-22 06:30:08,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:08,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428568034] [2020-12-22 06:30:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:09,000 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 06:30:09,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428568034] [2020-12-22 06:30:09,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:09,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:30:09,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707404360] [2020-12-22 06:30:09,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:09,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:09,006 INFO L87 Difference]: Start difference. First operand 552 states and 957 transitions. Second operand 5 states. [2020-12-22 06:30:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:09,321 INFO L93 Difference]: Finished difference Result 1605 states and 2787 transitions. [2020-12-22 06:30:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:30:09,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 06:30:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:09,328 INFO L225 Difference]: With dead ends: 1605 [2020-12-22 06:30:09,329 INFO L226 Difference]: Without dead ends: 1072 [2020-12-22 06:30:09,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 06:30:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-12-22 06:30:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 552. [2020-12-22 06:30:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-12-22 06:30:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 956 transitions. [2020-12-22 06:30:09,359 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 956 transitions. Word has length 64 [2020-12-22 06:30:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:09,360 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 956 transitions. [2020-12-22 06:30:09,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 956 transitions. [2020-12-22 06:30:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:30:09,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:09,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:09,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:30:09,362 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash -740205932, now seen corresponding path program 1 times [2020-12-22 06:30:09,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:09,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745600188] [2020-12-22 06:30:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:09,462 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 06:30:09,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745600188] [2020-12-22 06:30:09,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:09,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:09,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9651524] [2020-12-22 06:30:09,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:09,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:09,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:09,473 INFO L87 Difference]: Start difference. First operand 552 states and 956 transitions. Second operand 3 states. [2020-12-22 06:30:09,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:09,542 INFO L93 Difference]: Finished difference Result 1086 states and 1886 transitions. [2020-12-22 06:30:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:09,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:30:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:09,598 INFO L225 Difference]: With dead ends: 1086 [2020-12-22 06:30:09,599 INFO L226 Difference]: Without dead ends: 557 [2020-12-22 06:30:09,600 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 06:30:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-12-22 06:30:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 552. [2020-12-22 06:30:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-12-22 06:30:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 955 transitions. [2020-12-22 06:30:09,630 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 955 transitions. Word has length 65 [2020-12-22 06:30:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:09,637 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 955 transitions. [2020-12-22 06:30:09,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 955 transitions. [2020-12-22 06:30:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:30:09,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:09,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:09,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:30:09,640 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1127670618, now seen corresponding path program 1 times [2020-12-22 06:30:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:09,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8408999] [2020-12-22 06:30:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:09,784 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 06:30:09,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8408999] [2020-12-22 06:30:09,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:09,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:09,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240497405] [2020-12-22 06:30:09,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:09,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:09,790 INFO L87 Difference]: Start difference. First operand 552 states and 955 transitions. Second operand 3 states. [2020-12-22 06:30:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:09,857 INFO L93 Difference]: Finished difference Result 1096 states and 1899 transitions. [2020-12-22 06:30:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:09,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:30:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:09,862 INFO L225 Difference]: With dead ends: 1096 [2020-12-22 06:30:09,863 INFO L226 Difference]: Without dead ends: 552 [2020-12-22 06:30:09,865 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 06:30:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-12-22 06:30:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2020-12-22 06:30:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-12-22 06:30:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 953 transitions. [2020-12-22 06:30:09,893 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 953 transitions. Word has length 66 [2020-12-22 06:30:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:09,895 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 953 transitions. [2020-12-22 06:30:09,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 953 transitions. [2020-12-22 06:30:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:30:09,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:09,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:09,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:30:09,899 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1994568175, now seen corresponding path program 1 times [2020-12-22 06:30:09,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:09,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375147760] [2020-12-22 06:30:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:10,024 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 06:30:10,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375147760] [2020-12-22 06:30:10,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:10,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:30:10,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199145674] [2020-12-22 06:30:10,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:10,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:10,030 INFO L87 Difference]: Start difference. First operand 552 states and 953 transitions. Second operand 5 states. [2020-12-22 06:30:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:10,228 INFO L93 Difference]: Finished difference Result 1595 states and 2767 transitions. [2020-12-22 06:30:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:30:10,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 06:30:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:10,237 INFO L225 Difference]: With dead ends: 1595 [2020-12-22 06:30:10,237 INFO L226 Difference]: Without dead ends: 1070 [2020-12-22 06:30:10,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:30:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2020-12-22 06:30:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 552. [2020-12-22 06:30:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-12-22 06:30:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 952 transitions. [2020-12-22 06:30:10,282 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 952 transitions. Word has length 67 [2020-12-22 06:30:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:10,282 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 952 transitions. [2020-12-22 06:30:10,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 952 transitions. [2020-12-22 06:30:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:30:10,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:10,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:10,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:30:10,315 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash -96892270, now seen corresponding path program 1 times [2020-12-22 06:30:10,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:10,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707470309] [2020-12-22 06:30:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:10,448 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 06:30:10,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707470309] [2020-12-22 06:30:10,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:10,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:30:10,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970115166] [2020-12-22 06:30:10,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:10,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:10,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:10,453 INFO L87 Difference]: Start difference. First operand 552 states and 952 transitions. Second operand 5 states. [2020-12-22 06:30:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:10,677 INFO L93 Difference]: Finished difference Result 1600 states and 2772 transitions. [2020-12-22 06:30:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:30:10,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 06:30:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:10,684 INFO L225 Difference]: With dead ends: 1600 [2020-12-22 06:30:10,685 INFO L226 Difference]: Without dead ends: 1075 [2020-12-22 06:30:10,687 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 06:30:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2020-12-22 06:30:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 552. [2020-12-22 06:30:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-12-22 06:30:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 951 transitions. [2020-12-22 06:30:10,732 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 951 transitions. Word has length 68 [2020-12-22 06:30:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:10,733 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 951 transitions. [2020-12-22 06:30:10,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 951 transitions. [2020-12-22 06:30:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:30:10,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:10,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:10,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:30:10,736 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash 45281194, now seen corresponding path program 1 times [2020-12-22 06:30:10,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:10,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500675489] [2020-12-22 06:30:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:10,837 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 06:30:10,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500675489] [2020-12-22 06:30:10,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:10,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:10,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564503958] [2020-12-22 06:30:10,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:10,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:10,841 INFO L87 Difference]: Start difference. First operand 552 states and 951 transitions. Second operand 3 states. [2020-12-22 06:30:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:10,889 INFO L93 Difference]: Finished difference Result 862 states and 1471 transitions. [2020-12-22 06:30:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:10,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:30:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:10,894 INFO L225 Difference]: With dead ends: 862 [2020-12-22 06:30:10,895 INFO L226 Difference]: Without dead ends: 555 [2020-12-22 06:30:10,897 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 06:30:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-12-22 06:30:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 554. [2020-12-22 06:30:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-12-22 06:30:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 953 transitions. [2020-12-22 06:30:10,933 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 953 transitions. Word has length 69 [2020-12-22 06:30:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:10,935 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 953 transitions. [2020-12-22 06:30:10,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 953 transitions. [2020-12-22 06:30:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:30:10,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:10,937 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:10,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:30:10,937 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:10,938 INFO L82 PathProgramCache]: Analyzing trace with hash 321128984, now seen corresponding path program 1 times [2020-12-22 06:30:10,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:10,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980707534] [2020-12-22 06:30:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:11,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980707534] [2020-12-22 06:30:11,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:11,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:11,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035032670] [2020-12-22 06:30:11,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:11,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:11,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:11,009 INFO L87 Difference]: Start difference. First operand 554 states and 953 transitions. Second operand 3 states. [2020-12-22 06:30:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:11,098 INFO L93 Difference]: Finished difference Result 1548 states and 2683 transitions. [2020-12-22 06:30:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:11,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 06:30:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:11,104 INFO L225 Difference]: With dead ends: 1548 [2020-12-22 06:30:11,104 INFO L226 Difference]: Without dead ends: 1025 [2020-12-22 06:30:11,106 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 06:30:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2020-12-22 06:30:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 718. [2020-12-22 06:30:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-12-22 06:30:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1253 transitions. [2020-12-22 06:30:11,151 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1253 transitions. Word has length 77 [2020-12-22 06:30:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:11,151 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 1253 transitions. [2020-12-22 06:30:11,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1253 transitions. [2020-12-22 06:30:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 06:30:11,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:11,154 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:11,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:30:11,154 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:11,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1056863159, now seen corresponding path program 1 times [2020-12-22 06:30:11,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:11,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876325423] [2020-12-22 06:30:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:11,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876325423] [2020-12-22 06:30:11,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:11,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:30:11,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374218303] [2020-12-22 06:30:11,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:11,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:11,244 INFO L87 Difference]: Start difference. First operand 718 states and 1253 transitions. Second operand 5 states. [2020-12-22 06:30:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:11,516 INFO L93 Difference]: Finished difference Result 2084 states and 3665 transitions. [2020-12-22 06:30:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:30:11,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-12-22 06:30:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:11,526 INFO L225 Difference]: With dead ends: 2084 [2020-12-22 06:30:11,526 INFO L226 Difference]: Without dead ends: 1397 [2020-12-22 06:30:11,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:30:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-12-22 06:30:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 718. [2020-12-22 06:30:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-12-22 06:30:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1251 transitions. [2020-12-22 06:30:11,591 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1251 transitions. Word has length 78 [2020-12-22 06:30:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:11,592 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 1251 transitions. [2020-12-22 06:30:11,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1251 transitions. [2020-12-22 06:30:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:30:11,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:11,594 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:11,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:30:11,594 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1237964466, now seen corresponding path program 1 times [2020-12-22 06:30:11,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:11,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926467433] [2020-12-22 06:30:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:11,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926467433] [2020-12-22 06:30:11,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:11,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:11,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659166881] [2020-12-22 06:30:11,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:11,675 INFO L87 Difference]: Start difference. First operand 718 states and 1251 transitions. Second operand 3 states. [2020-12-22 06:30:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:11,806 INFO L93 Difference]: Finished difference Result 2082 states and 3657 transitions. [2020-12-22 06:30:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:11,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 06:30:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:11,816 INFO L225 Difference]: With dead ends: 2082 [2020-12-22 06:30:11,816 INFO L226 Difference]: Without dead ends: 1395 [2020-12-22 06:30:11,819 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 06:30:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2020-12-22 06:30:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1088. [2020-12-22 06:30:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1088 states. [2020-12-22 06:30:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1928 transitions. [2020-12-22 06:30:11,897 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1928 transitions. Word has length 79 [2020-12-22 06:30:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:11,898 INFO L481 AbstractCegarLoop]: Abstraction has 1088 states and 1928 transitions. [2020-12-22 06:30:11,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1928 transitions. [2020-12-22 06:30:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:30:11,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:11,901 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:11,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:30:11,901 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:11,902 INFO L82 PathProgramCache]: Analyzing trace with hash 63853164, now seen corresponding path program 1 times [2020-12-22 06:30:11,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:11,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219446018] [2020-12-22 06:30:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219446018] [2020-12-22 06:30:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522858184] [2020-12-22 06:30:11,982 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 06:30:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:30:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:30:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:12,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:30:12,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:30:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475980599] [2020-12-22 06:30:12,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:12,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:12,573 INFO L87 Difference]: Start difference. First operand 1088 states and 1928 transitions. Second operand 5 states. [2020-12-22 06:30:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:12,721 INFO L93 Difference]: Finished difference Result 1925 states and 3363 transitions. [2020-12-22 06:30:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:30:12,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-12-22 06:30:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:12,732 INFO L225 Difference]: With dead ends: 1925 [2020-12-22 06:30:12,732 INFO L226 Difference]: Without dead ends: 1618 [2020-12-22 06:30:12,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:12,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2020-12-22 06:30:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1308. [2020-12-22 06:30:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2020-12-22 06:30:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2325 transitions. [2020-12-22 06:30:12,835 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2325 transitions. Word has length 79 [2020-12-22 06:30:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:12,835 INFO L481 AbstractCegarLoop]: Abstraction has 1308 states and 2325 transitions. [2020-12-22 06:30:12,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2325 transitions. [2020-12-22 06:30:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 06:30:12,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:12,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:13,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:30:13,054 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1870554889, now seen corresponding path program 1 times [2020-12-22 06:30:13,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:13,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649878225] [2020-12-22 06:30:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:13,151 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 06:30:13,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649878225] [2020-12-22 06:30:13,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:13,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:13,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330770990] [2020-12-22 06:30:13,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:13,153 INFO L87 Difference]: Start difference. First operand 1308 states and 2325 transitions. Second operand 3 states. [2020-12-22 06:30:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:13,353 INFO L93 Difference]: Finished difference Result 3554 states and 6342 transitions. [2020-12-22 06:30:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:13,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 06:30:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:13,374 INFO L225 Difference]: With dead ends: 3554 [2020-12-22 06:30:13,374 INFO L226 Difference]: Without dead ends: 2347 [2020-12-22 06:30:13,377 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 06:30:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2020-12-22 06:30:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2040. [2020-12-22 06:30:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-12-22 06:30:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 3658 transitions. [2020-12-22 06:30:13,573 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 3658 transitions. Word has length 83 [2020-12-22 06:30:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:13,575 INFO L481 AbstractCegarLoop]: Abstraction has 2040 states and 3658 transitions. [2020-12-22 06:30:13,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 3658 transitions. [2020-12-22 06:30:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 06:30:13,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:13,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:13,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:30:13,581 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash 750281865, now seen corresponding path program 1 times [2020-12-22 06:30:13,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:13,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948294863] [2020-12-22 06:30:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:13,682 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 06:30:13,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948294863] [2020-12-22 06:30:13,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:13,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:13,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117859434] [2020-12-22 06:30:13,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:13,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:13,690 INFO L87 Difference]: Start difference. First operand 2040 states and 3658 transitions. Second operand 3 states. [2020-12-22 06:30:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:13,937 INFO L93 Difference]: Finished difference Result 5486 states and 9860 transitions. [2020-12-22 06:30:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:13,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 06:30:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:13,959 INFO L225 Difference]: With dead ends: 5486 [2020-12-22 06:30:13,959 INFO L226 Difference]: Without dead ends: 3581 [2020-12-22 06:30:13,965 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 06:30:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2020-12-22 06:30:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3274. [2020-12-22 06:30:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3274 states. [2020-12-22 06:30:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3274 states to 3274 states and 5899 transitions. [2020-12-22 06:30:14,222 INFO L78 Accepts]: Start accepts. Automaton has 3274 states and 5899 transitions. Word has length 84 [2020-12-22 06:30:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:14,223 INFO L481 AbstractCegarLoop]: Abstraction has 3274 states and 5899 transitions. [2020-12-22 06:30:14,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3274 states and 5899 transitions. [2020-12-22 06:30:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 06:30:14,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:14,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:14,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:30:14,234 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1916382970, now seen corresponding path program 1 times [2020-12-22 06:30:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:14,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103739485] [2020-12-22 06:30:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:14,310 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 06:30:14,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103739485] [2020-12-22 06:30:14,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:14,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:14,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825135150] [2020-12-22 06:30:14,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:14,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:14,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:14,314 INFO L87 Difference]: Start difference. First operand 3274 states and 5899 transitions. Second operand 3 states. [2020-12-22 06:30:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:14,702 INFO L93 Difference]: Finished difference Result 8904 states and 16066 transitions. [2020-12-22 06:30:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:14,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 06:30:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:14,759 INFO L225 Difference]: With dead ends: 8904 [2020-12-22 06:30:14,759 INFO L226 Difference]: Without dead ends: 5799 [2020-12-22 06:30:14,765 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 06:30:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5799 states. [2020-12-22 06:30:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5799 to 5492. [2020-12-22 06:30:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5492 states. [2020-12-22 06:30:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 9916 transitions. [2020-12-22 06:30:15,140 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 9916 transitions. Word has length 85 [2020-12-22 06:30:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:15,140 INFO L481 AbstractCegarLoop]: Abstraction has 5492 states and 9916 transitions. [2020-12-22 06:30:15,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:15,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 9916 transitions. [2020-12-22 06:30:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 06:30:15,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:15,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:15,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:30:15,151 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1193726810, now seen corresponding path program 1 times [2020-12-22 06:30:15,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:15,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304878224] [2020-12-22 06:30:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:15,230 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 06:30:15,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304878224] [2020-12-22 06:30:15,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:15,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:15,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445752378] [2020-12-22 06:30:15,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:15,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:15,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:15,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:15,236 INFO L87 Difference]: Start difference. First operand 5492 states and 9916 transitions. Second operand 3 states. [2020-12-22 06:30:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:15,972 INFO L93 Difference]: Finished difference Result 15884 states and 28728 transitions. [2020-12-22 06:30:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:15,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 06:30:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:16,018 INFO L225 Difference]: With dead ends: 15884 [2020-12-22 06:30:16,018 INFO L226 Difference]: Without dead ends: 10569 [2020-12-22 06:30:16,036 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 06:30:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10569 states. [2020-12-22 06:30:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10569 to 10262. [2020-12-22 06:30:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10262 states. [2020-12-22 06:30:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10262 states to 10262 states and 18557 transitions. [2020-12-22 06:30:16,903 INFO L78 Accepts]: Start accepts. Automaton has 10262 states and 18557 transitions. Word has length 86 [2020-12-22 06:30:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:16,904 INFO L481 AbstractCegarLoop]: Abstraction has 10262 states and 18557 transitions. [2020-12-22 06:30:16,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10262 states and 18557 transitions. [2020-12-22 06:30:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 06:30:16,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:16,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:16,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:30:16,919 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:16,920 INFO L82 PathProgramCache]: Analyzing trace with hash 185188393, now seen corresponding path program 1 times [2020-12-22 06:30:16,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:16,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526781467] [2020-12-22 06:30:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:16,986 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 06:30:16,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526781467] [2020-12-22 06:30:16,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:16,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:16,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453412305] [2020-12-22 06:30:16,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:16,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:16,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:16,988 INFO L87 Difference]: Start difference. First operand 10262 states and 18557 transitions. Second operand 3 states. [2020-12-22 06:30:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:18,134 INFO L93 Difference]: Finished difference Result 30024 states and 54350 transitions. [2020-12-22 06:30:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:18,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 06:30:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:18,214 INFO L225 Difference]: With dead ends: 30024 [2020-12-22 06:30:18,214 INFO L226 Difference]: Without dead ends: 19947 [2020-12-22 06:30:18,238 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 06:30:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19947 states. [2020-12-22 06:30:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19947 to 19640. [2020-12-22 06:30:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19640 states. [2020-12-22 06:30:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19640 states to 19640 states and 35518 transitions. [2020-12-22 06:30:19,744 INFO L78 Accepts]: Start accepts. Automaton has 19640 states and 35518 transitions. Word has length 87 [2020-12-22 06:30:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:19,745 INFO L481 AbstractCegarLoop]: Abstraction has 19640 states and 35518 transitions. [2020-12-22 06:30:19,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 19640 states and 35518 transitions. [2020-12-22 06:30:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 06:30:19,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:19,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:19,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:30:19,770 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1882438935, now seen corresponding path program 1 times [2020-12-22 06:30:19,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:19,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435736571] [2020-12-22 06:30:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:19,846 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 06:30:19,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435736571] [2020-12-22 06:30:19,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:19,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:19,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588114557] [2020-12-22 06:30:19,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:19,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:19,848 INFO L87 Difference]: Start difference. First operand 19640 states and 35518 transitions. Second operand 3 states. [2020-12-22 06:30:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:21,882 INFO L93 Difference]: Finished difference Result 58344 states and 105547 transitions. [2020-12-22 06:30:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:21,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-22 06:30:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:22,095 INFO L225 Difference]: With dead ends: 58344 [2020-12-22 06:30:22,095 INFO L226 Difference]: Without dead ends: 38893 [2020-12-22 06:30:22,128 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 06:30:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38893 states. [2020-12-22 06:30:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38893 to 38586. [2020-12-22 06:30:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38586 states. [2020-12-22 06:30:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38586 states to 38586 states and 69695 transitions. [2020-12-22 06:30:25,010 INFO L78 Accepts]: Start accepts. Automaton has 38586 states and 69695 transitions. Word has length 88 [2020-12-22 06:30:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:25,011 INFO L481 AbstractCegarLoop]: Abstraction has 38586 states and 69695 transitions. [2020-12-22 06:30:25,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 38586 states and 69695 transitions. [2020-12-22 06:30:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:30:25,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:25,043 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:25,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:30:25,044 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1286700656, now seen corresponding path program 1 times [2020-12-22 06:30:25,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227876153] [2020-12-22 06:30:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:30:25,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227876153] [2020-12-22 06:30:25,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:25,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:30:25,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557495236] [2020-12-22 06:30:25,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:25,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:25,156 INFO L87 Difference]: Start difference. First operand 38586 states and 69695 transitions. Second operand 5 states. [2020-12-22 06:30:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:28,456 INFO L93 Difference]: Finished difference Result 113453 states and 204884 transitions. [2020-12-22 06:30:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:30:28,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-12-22 06:30:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:28,666 INFO L225 Difference]: With dead ends: 113453 [2020-12-22 06:30:28,666 INFO L226 Difference]: Without dead ends: 75124 [2020-12-22 06:30:28,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:30:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75124 states. [2020-12-22 06:30:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75124 to 38586. [2020-12-22 06:30:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38586 states. [2020-12-22 06:30:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38586 states to 38586 states and 69437 transitions. [2020-12-22 06:30:31,922 INFO L78 Accepts]: Start accepts. Automaton has 38586 states and 69437 transitions. Word has length 89 [2020-12-22 06:30:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:31,922 INFO L481 AbstractCegarLoop]: Abstraction has 38586 states and 69437 transitions. [2020-12-22 06:30:31,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 38586 states and 69437 transitions. [2020-12-22 06:30:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:30:31,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:31,965 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:30:31,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:30:31,966 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 15116974, now seen corresponding path program 2 times [2020-12-22 06:30:31,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:31,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758908591] [2020-12-22 06:30:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:32,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758908591] [2020-12-22 06:30:32,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:32,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:30:32,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021060981] [2020-12-22 06:30:32,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:32,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:32,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:32,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:32,066 INFO L87 Difference]: Start difference. First operand 38586 states and 69437 transitions. Second operand 5 states. [2020-12-22 06:30:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:33,714 INFO L93 Difference]: Finished difference Result 77216 states and 138949 transitions. [2020-12-22 06:30:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:30:33,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-12-22 06:30:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:33,785 INFO L225 Difference]: With dead ends: 77216 [2020-12-22 06:30:33,785 INFO L226 Difference]: Without dead ends: 38893 [2020-12-22 06:30:33,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 06:30:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38893 states. [2020-12-22 06:30:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38893 to 38586. [2020-12-22 06:30:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38586 states. [2020-12-22 06:30:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38586 states to 38586 states and 69309 transitions. [2020-12-22 06:30:35,965 INFO L78 Accepts]: Start accepts. Automaton has 38586 states and 69309 transitions. Word has length 89 [2020-12-22 06:30:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:35,965 INFO L481 AbstractCegarLoop]: Abstraction has 38586 states and 69309 transitions. [2020-12-22 06:30:35,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 38586 states and 69309 transitions. [2020-12-22 06:30:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:30:35,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:35,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:35,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:30:35,989 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash -897389925, now seen corresponding path program 1 times [2020-12-22 06:30:35,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:35,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364030068] [2020-12-22 06:30:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:36,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364030068] [2020-12-22 06:30:36,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:36,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:30:36,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225809647] [2020-12-22 06:30:36,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:30:36,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:30:36,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:36,057 INFO L87 Difference]: Start difference. First operand 38586 states and 69309 transitions. Second operand 3 states. [2020-12-22 06:30:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:38,900 INFO L93 Difference]: Finished difference Result 107338 states and 192527 transitions. [2020-12-22 06:30:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:38,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 06:30:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:39,045 INFO L225 Difference]: With dead ends: 107338 [2020-12-22 06:30:39,046 INFO L226 Difference]: Without dead ends: 68975 [2020-12-22 06:30:39,094 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 06:30:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68975 states. [2020-12-22 06:30:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68975 to 68668. [2020-12-22 06:30:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68668 states. [2020-12-22 06:30:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68668 states to 68668 states and 122814 transitions. [2020-12-22 06:30:42,603 INFO L78 Accepts]: Start accepts. Automaton has 68668 states and 122814 transitions. Word has length 89 [2020-12-22 06:30:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:42,604 INFO L481 AbstractCegarLoop]: Abstraction has 68668 states and 122814 transitions. [2020-12-22 06:30:42,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 68668 states and 122814 transitions. [2020-12-22 06:30:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 06:30:42,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:42,625 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:42,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:30:42,625 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1896208908, now seen corresponding path program 1 times [2020-12-22 06:30:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:42,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559258097] [2020-12-22 06:30:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:30:42,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559258097] [2020-12-22 06:30:42,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:42,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:30:42,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116609598] [2020-12-22 06:30:42,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:30:42,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:30:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:30:42,798 INFO L87 Difference]: Start difference. First operand 68668 states and 122814 transitions. Second operand 9 states. [2020-12-22 06:30:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:46,601 INFO L93 Difference]: Finished difference Result 70550 states and 125939 transitions. [2020-12-22 06:30:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:30:46,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-12-22 06:30:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:46,730 INFO L225 Difference]: With dead ends: 70550 [2020-12-22 06:30:46,730 INFO L226 Difference]: Without dead ends: 70295 [2020-12-22 06:30:46,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-12-22 06:30:46,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70295 states. [2020-12-22 06:30:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70295 to 68760. [2020-12-22 06:30:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68760 states. [2020-12-22 06:30:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68760 states to 68760 states and 122961 transitions. [2020-12-22 06:30:50,233 INFO L78 Accepts]: Start accepts. Automaton has 68760 states and 122961 transitions. Word has length 90 [2020-12-22 06:30:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:50,234 INFO L481 AbstractCegarLoop]: Abstraction has 68760 states and 122961 transitions. [2020-12-22 06:30:50,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:30:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 68760 states and 122961 transitions. [2020-12-22 06:30:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 06:30:50,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:50,255 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:30:50,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:30:50,255 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -370716550, now seen corresponding path program 1 times [2020-12-22 06:30:50,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:50,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181264505] [2020-12-22 06:30:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:30:50,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181264505] [2020-12-22 06:30:50,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:50,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:30:50,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983785656] [2020-12-22 06:30:50,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:30:50,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:50,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:30:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:30:50,414 INFO L87 Difference]: Start difference. First operand 68760 states and 122961 transitions. Second operand 5 states. [2020-12-22 06:30:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:53,572 INFO L93 Difference]: Finished difference Result 70996 states and 126645 transitions. [2020-12-22 06:30:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:30:53,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2020-12-22 06:30:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:53,685 INFO L225 Difference]: With dead ends: 70996 [2020-12-22 06:30:53,685 INFO L226 Difference]: Without dead ends: 70675 [2020-12-22 06:30:53,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:30:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70675 states. [2020-12-22 06:30:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70675 to 69078. [2020-12-22 06:30:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69078 states. [2020-12-22 06:30:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69078 states to 69078 states and 123479 transitions. [2020-12-22 06:30:57,223 INFO L78 Accepts]: Start accepts. Automaton has 69078 states and 123479 transitions. Word has length 91 [2020-12-22 06:30:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:57,223 INFO L481 AbstractCegarLoop]: Abstraction has 69078 states and 123479 transitions. [2020-12-22 06:30:57,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:30:57,223 INFO L276 IsEmpty]: Start isEmpty. Operand 69078 states and 123479 transitions. [2020-12-22 06:30:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 06:30:57,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:57,241 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:57,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:30:57,242 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1409958576, now seen corresponding path program 1 times [2020-12-22 06:30:57,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:57,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484725047] [2020-12-22 06:30:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:30:57,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484725047] [2020-12-22 06:30:57,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:57,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:30:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436657984] [2020-12-22 06:30:57,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:30:57,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:30:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:30:57,365 INFO L87 Difference]: Start difference. First operand 69078 states and 123479 transitions. Second operand 7 states. [2020-12-22 06:31:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:31:00,360 INFO L93 Difference]: Finished difference Result 71388 states and 127257 transitions. [2020-12-22 06:31:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:31:00,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-12-22 06:31:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:31:00,473 INFO L225 Difference]: With dead ends: 71388 [2020-12-22 06:31:00,474 INFO L226 Difference]: Without dead ends: 70853 [2020-12-22 06:31:00,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:31:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70853 states. [2020-12-22 06:31:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70853 to 69084. [2020-12-22 06:31:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69084 states. [2020-12-22 06:31:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69084 states to 69084 states and 123485 transitions. [2020-12-22 06:31:03,859 INFO L78 Accepts]: Start accepts. Automaton has 69084 states and 123485 transitions. Word has length 92 [2020-12-22 06:31:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:31:03,859 INFO L481 AbstractCegarLoop]: Abstraction has 69084 states and 123485 transitions. [2020-12-22 06:31:03,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:31:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 69084 states and 123485 transitions. [2020-12-22 06:31:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 06:31:03,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:31:03,882 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:31:03,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:31:03,883 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:31:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:31:03,883 INFO L82 PathProgramCache]: Analyzing trace with hash 643190133, now seen corresponding path program 1 times [2020-12-22 06:31:03,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:31:03,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703429512] [2020-12-22 06:31:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:31:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:31:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:31:04,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703429512] [2020-12-22 06:31:04,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:31:04,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:31:04,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329793740] [2020-12-22 06:31:04,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:31:04,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:31:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:31:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:31:04,032 INFO L87 Difference]: Start difference. First operand 69084 states and 123485 transitions. Second operand 10 states. [2020-12-22 06:31:04,506 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-22 06:31:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:31:07,409 INFO L93 Difference]: Finished difference Result 70089 states and 125116 transitions. [2020-12-22 06:31:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 06:31:07,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-12-22 06:31:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:31:07,524 INFO L225 Difference]: With dead ends: 70089 [2020-12-22 06:31:07,524 INFO L226 Difference]: Without dead ends: 69442 [2020-12-22 06:31:07,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-12-22 06:31:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69442 states. [2020-12-22 06:31:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69442 to 69074. [2020-12-22 06:31:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69074 states. [2020-12-22 06:31:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69074 states to 69074 states and 123465 transitions. [2020-12-22 06:31:10,928 INFO L78 Accepts]: Start accepts. Automaton has 69074 states and 123465 transitions. Word has length 92 [2020-12-22 06:31:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:31:10,928 INFO L481 AbstractCegarLoop]: Abstraction has 69074 states and 123465 transitions. [2020-12-22 06:31:10,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:31:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 69074 states and 123465 transitions. [2020-12-22 06:31:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 06:31:10,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:31:10,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:31:10,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:31:10,952 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:31:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:31:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash 28239424, now seen corresponding path program 1 times [2020-12-22 06:31:10,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:31:10,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882351473] [2020-12-22 06:31:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:31:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:31:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:31:11,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882351473] [2020-12-22 06:31:11,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:31:11,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:31:11,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162336924] [2020-12-22 06:31:11,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:31:11,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:31:11,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:31:11,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:31:11,050 INFO L87 Difference]: Start difference. First operand 69074 states and 123465 transitions. Second operand 5 states. [2020-12-22 06:31:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:31:17,180 INFO L93 Difference]: Finished difference Result 141489 states and 252204 transitions. [2020-12-22 06:31:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:31:17,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-12-22 06:31:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:31:17,434 INFO L225 Difference]: With dead ends: 141489 [2020-12-22 06:31:17,434 INFO L226 Difference]: Without dead ends: 140809 [2020-12-22 06:31:17,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:31:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140809 states. [2020-12-22 06:31:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140809 to 137724. [2020-12-22 06:31:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137724 states. [2020-12-22 06:31:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137724 states to 137724 states and 246203 transitions. [2020-12-22 06:31:24,795 INFO L78 Accepts]: Start accepts. Automaton has 137724 states and 246203 transitions. Word has length 94 [2020-12-22 06:31:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:31:24,796 INFO L481 AbstractCegarLoop]: Abstraction has 137724 states and 246203 transitions. [2020-12-22 06:31:24,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:31:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 137724 states and 246203 transitions. [2020-12-22 06:31:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:31:24,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:31:24,872 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:31:24,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:31:24,872 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:31:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:31:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1270771676, now seen corresponding path program 1 times [2020-12-22 06:31:24,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:31:24,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414851216] [2020-12-22 06:31:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:31:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:31:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:31:24,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414851216] [2020-12-22 06:31:24,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:31:24,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:31:24,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219098668] [2020-12-22 06:31:24,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:31:24,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:31:24,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:31:24,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:31:24,970 INFO L87 Difference]: Start difference. First operand 137724 states and 246203 transitions. Second operand 7 states. [2020-12-22 06:31:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:31:30,711 INFO L93 Difference]: Finished difference Result 139714 states and 249377 transitions. [2020-12-22 06:31:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:31:30,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 06:31:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:31:30,978 INFO L225 Difference]: With dead ends: 139714 [2020-12-22 06:31:30,978 INFO L226 Difference]: Without dead ends: 138533 [2020-12-22 06:31:31,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:31:31,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138533 states. [2020-12-22 06:31:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138533 to 137712. [2020-12-22 06:31:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137712 states. [2020-12-22 06:31:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137712 states to 137712 states and 246177 transitions. [2020-12-22 06:31:37,800 INFO L78 Accepts]: Start accepts. Automaton has 137712 states and 246177 transitions. Word has length 95 [2020-12-22 06:31:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:31:37,800 INFO L481 AbstractCegarLoop]: Abstraction has 137712 states and 246177 transitions. [2020-12-22 06:31:37,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:31:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 137712 states and 246177 transitions. [2020-12-22 06:31:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:31:37,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:31:37,834 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:31:37,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:31:37,834 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:31:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:31:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash 837971749, now seen corresponding path program 1 times [2020-12-22 06:31:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:31:37,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956885888] [2020-12-22 06:31:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:31:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:31:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:31:38,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956885888] [2020-12-22 06:31:38,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:31:38,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:31:38,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046041977] [2020-12-22 06:31:38,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:31:38,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:31:38,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:31:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:31:38,234 INFO L87 Difference]: Start difference. First operand 137712 states and 246177 transitions. Second operand 5 states. [2020-12-22 06:31:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:31:44,691 INFO L93 Difference]: Finished difference Result 143292 states and 255087 transitions. [2020-12-22 06:31:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:31:44,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2020-12-22 06:31:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:31:44,947 INFO L225 Difference]: With dead ends: 143292 [2020-12-22 06:31:44,947 INFO L226 Difference]: Without dead ends: 142433 [2020-12-22 06:31:44,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:31:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142433 states. [2020-12-22 06:31:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142433 to 138582. [2020-12-22 06:31:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138582 states.