/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_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:29:14,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:29:14,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:29:14,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:29:14,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:29:14,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:29:14,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:29:14,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:29:14,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:29:14,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:29:14,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:29:14,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:29:14,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:29:14,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:29:14,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:29:14,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:29:14,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:29:14,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:29:14,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:29:14,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:29:14,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:29:14,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:29:14,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:29:14,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:29:14,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:29:14,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:29:14,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:29:14,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:29:14,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:29:14,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:29:14,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:29:14,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:29:14,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:29:14,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:29:14,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:29:14,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:29:14,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:29:14,751 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:29:14,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:29:14,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:29:14,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:29:14,757 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:29:14,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:29:14,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:29:14,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:29:14,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:29:14,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:29:14,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:29:14,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:29:14,761 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:29:14,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:29:14,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:29:14,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:29:14,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:29:14,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:29:14,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:29:14,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:29:14,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:29:14,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:29:14,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:29:14,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:29:14,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:29:14,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:29:15,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:29:15,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:29:15,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:29:15,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:29:15,214 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:29:15,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2020-12-22 06:29:15,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8f79f66/d8eaeefc5c544b83b18b85a05d432aba/FLAGa7f96a0bf [2020-12-22 06:29:16,074 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:29:16,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2020-12-22 06:29:16,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8f79f66/d8eaeefc5c544b83b18b85a05d432aba/FLAGa7f96a0bf [2020-12-22 06:29:16,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8f79f66/d8eaeefc5c544b83b18b85a05d432aba [2020-12-22 06:29:16,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:29:16,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:29:16,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:29:16,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:29:16,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:29:16,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:29:16" (1/1) ... [2020-12-22 06:29:16,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0c2e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:16, skipping insertion in model container [2020-12-22 06:29:16,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:29:16" (1/1) ... [2020-12-22 06:29:16,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:29:16,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:29:17,190 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_product30.cil.c[47304,47317] [2020-12-22 06:29:17,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:29:17,370 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:29:17,451 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_product30.cil.c[47304,47317] [2020-12-22 06:29:17,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:29:17,668 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:29:17,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17 WrapperNode [2020-12-22 06:29:17,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:29:17,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:29:17,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:29:17,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:29:17,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:29:17,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:29:17,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:29:17,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:29:17,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (1/1) ... [2020-12-22 06:29:17,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:29:17,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:29:17,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:29:18,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:29:18,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (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 06:29:18,103 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:29:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:29:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:29:18,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:29:18,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:29:20,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:29:20,781 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2020-12-22 06:29:20,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:29:20 BoogieIcfgContainer [2020-12-22 06:29:20,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:29:20,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:29:20,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:29:20,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:29:20,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:29:16" (1/3) ... [2020-12-22 06:29:20,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3119de40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:29:20, skipping insertion in model container [2020-12-22 06:29:20,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:29:17" (2/3) ... [2020-12-22 06:29:20,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3119de40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:29:20, skipping insertion in model container [2020-12-22 06:29:20,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:29:20" (3/3) ... [2020-12-22 06:29:20,801 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product30.cil.c [2020-12-22 06:29:20,808 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:29:20,815 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:29:20,839 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:29:20,891 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:29:20,892 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:29:20,892 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:29:20,892 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:29:20,892 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:29:20,892 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:29:20,892 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:29:20,893 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:29:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states. [2020-12-22 06:29:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:29:20,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:20,953 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 06:29:20,953 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1232814721, now seen corresponding path program 1 times [2020-12-22 06:29:20,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:20,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458764434] [2020-12-22 06:29:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:21,466 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 06:29:21,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458764434] [2020-12-22 06:29:21,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:21,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:21,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830524260] [2020-12-22 06:29:21,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:21,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:21,495 INFO L87 Difference]: Start difference. First operand 523 states. Second operand 3 states. [2020-12-22 06:29:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:21,705 INFO L93 Difference]: Finished difference Result 1534 states and 2696 transitions. [2020-12-22 06:29:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:21,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:29:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:21,738 INFO L225 Difference]: With dead ends: 1534 [2020-12-22 06:29:21,738 INFO L226 Difference]: Without dead ends: 992 [2020-12-22 06:29:21,750 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 06:29:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-12-22 06:29:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 505. [2020-12-22 06:29:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-12-22 06:29:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 882 transitions. [2020-12-22 06:29:21,858 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 882 transitions. Word has length 62 [2020-12-22 06:29:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:21,858 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 882 transitions. [2020-12-22 06:29:21,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 882 transitions. [2020-12-22 06:29:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:29:21,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:21,862 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 06:29:21,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:29:21,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:21,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2071876332, now seen corresponding path program 1 times [2020-12-22 06:29:21,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:21,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494396774] [2020-12-22 06:29:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:21,997 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 06:29:21,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494396774] [2020-12-22 06:29:21,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:21,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:29:21,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260882191] [2020-12-22 06:29:22,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:29:22,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:22,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:29:22,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:22,002 INFO L87 Difference]: Start difference. First operand 505 states and 882 transitions. Second operand 5 states. [2020-12-22 06:29:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:22,273 INFO L93 Difference]: Finished difference Result 1464 states and 2562 transitions. [2020-12-22 06:29:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:29:22,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 06:29:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:22,280 INFO L225 Difference]: With dead ends: 1464 [2020-12-22 06:29:22,280 INFO L226 Difference]: Without dead ends: 978 [2020-12-22 06:29:22,283 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 06:29:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-12-22 06:29:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 505. [2020-12-22 06:29:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-12-22 06:29:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 881 transitions. [2020-12-22 06:29:22,312 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 881 transitions. Word has length 64 [2020-12-22 06:29:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:22,313 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 881 transitions. [2020-12-22 06:29:22,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 881 transitions. [2020-12-22 06:29:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:29:22,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:22,316 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 06:29:22,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:29:22,316 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 910925921, now seen corresponding path program 1 times [2020-12-22 06:29:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:22,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7173012] [2020-12-22 06:29:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:22,436 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 06:29:22,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7173012] [2020-12-22 06:29:22,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:22,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:22,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298394437] [2020-12-22 06:29:22,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:22,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:22,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:22,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:22,443 INFO L87 Difference]: Start difference. First operand 505 states and 881 transitions. Second operand 3 states. [2020-12-22 06:29:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:22,493 INFO L93 Difference]: Finished difference Result 992 states and 1736 transitions. [2020-12-22 06:29:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:22,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:29:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:22,499 INFO L225 Difference]: With dead ends: 992 [2020-12-22 06:29:22,499 INFO L226 Difference]: Without dead ends: 510 [2020-12-22 06:29:22,502 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 06:29:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-22 06:29:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 505. [2020-12-22 06:29:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-12-22 06:29:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 880 transitions. [2020-12-22 06:29:22,531 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 880 transitions. Word has length 65 [2020-12-22 06:29:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:22,539 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 880 transitions. [2020-12-22 06:29:22,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 880 transitions. [2020-12-22 06:29:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:29:22,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:22,542 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 06:29:22,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:29:22,545 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1516164825, now seen corresponding path program 1 times [2020-12-22 06:29:22,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:22,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643560160] [2020-12-22 06:29:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:22,627 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 06:29:22,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643560160] [2020-12-22 06:29:22,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:22,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:22,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418794621] [2020-12-22 06:29:22,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:22,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:22,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:22,631 INFO L87 Difference]: Start difference. First operand 505 states and 880 transitions. Second operand 3 states. [2020-12-22 06:29:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:22,677 INFO L93 Difference]: Finished difference Result 1002 states and 1749 transitions. [2020-12-22 06:29:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:22,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:29:22,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:22,681 INFO L225 Difference]: With dead ends: 1002 [2020-12-22 06:29:22,681 INFO L226 Difference]: Without dead ends: 505 [2020-12-22 06:29:22,683 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 06:29:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-12-22 06:29:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2020-12-22 06:29:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-12-22 06:29:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 878 transitions. [2020-12-22 06:29:22,711 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 878 transitions. Word has length 66 [2020-12-22 06:29:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:22,713 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 878 transitions. [2020-12-22 06:29:22,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 878 transitions. [2020-12-22 06:29:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:29:22,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:22,716 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 06:29:22,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:29:22,717 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:22,718 INFO L82 PathProgramCache]: Analyzing trace with hash -649267268, now seen corresponding path program 1 times [2020-12-22 06:29:22,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:22,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090629411] [2020-12-22 06:29:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:22,852 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 06:29:22,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090629411] [2020-12-22 06:29:22,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:22,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:29:22,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488181420] [2020-12-22 06:29:22,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:29:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:29:22,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:22,856 INFO L87 Difference]: Start difference. First operand 505 states and 878 transitions. Second operand 5 states. [2020-12-22 06:29:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:23,048 INFO L93 Difference]: Finished difference Result 1454 states and 2542 transitions. [2020-12-22 06:29:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:29:23,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 06:29:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:23,055 INFO L225 Difference]: With dead ends: 1454 [2020-12-22 06:29:23,056 INFO L226 Difference]: Without dead ends: 976 [2020-12-22 06:29:23,057 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 06:29:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-12-22 06:29:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 505. [2020-12-22 06:29:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-12-22 06:29:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 877 transitions. [2020-12-22 06:29:23,087 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 877 transitions. Word has length 67 [2020-12-22 06:29:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:23,087 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 877 transitions. [2020-12-22 06:29:23,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 877 transitions. [2020-12-22 06:29:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:29:23,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:23,090 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 06:29:23,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:29:23,091 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1554239583, now seen corresponding path program 1 times [2020-12-22 06:29:23,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:23,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692711335] [2020-12-22 06:29:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:23,221 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 06:29:23,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692711335] [2020-12-22 06:29:23,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:23,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:29:23,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298208132] [2020-12-22 06:29:23,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:29:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:23,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:29:23,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:23,227 INFO L87 Difference]: Start difference. First operand 505 states and 877 transitions. Second operand 5 states. [2020-12-22 06:29:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:23,423 INFO L93 Difference]: Finished difference Result 1459 states and 2547 transitions. [2020-12-22 06:29:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:29:23,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 06:29:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:23,430 INFO L225 Difference]: With dead ends: 1459 [2020-12-22 06:29:23,430 INFO L226 Difference]: Without dead ends: 981 [2020-12-22 06:29:23,432 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 06:29:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2020-12-22 06:29:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 505. [2020-12-22 06:29:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-12-22 06:29:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 876 transitions. [2020-12-22 06:29:23,466 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 876 transitions. Word has length 68 [2020-12-22 06:29:23,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:23,467 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 876 transitions. [2020-12-22 06:29:23,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 876 transitions. [2020-12-22 06:29:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:29:23,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:23,469 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 06:29:23,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:29:23,470 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1696413047, now seen corresponding path program 1 times [2020-12-22 06:29:23,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:23,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610235382] [2020-12-22 06:29:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:23,599 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 06:29:23,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610235382] [2020-12-22 06:29:23,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:23,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:23,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137940594] [2020-12-22 06:29:23,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:23,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:23,603 INFO L87 Difference]: Start difference. First operand 505 states and 876 transitions. Second operand 3 states. [2020-12-22 06:29:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:23,643 INFO L93 Difference]: Finished difference Result 772 states and 1328 transitions. [2020-12-22 06:29:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:23,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:29:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:23,648 INFO L225 Difference]: With dead ends: 772 [2020-12-22 06:29:23,648 INFO L226 Difference]: Without dead ends: 508 [2020-12-22 06:29:23,650 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 06:29:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-12-22 06:29:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 507. [2020-12-22 06:29:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-12-22 06:29:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 878 transitions. [2020-12-22 06:29:23,683 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 878 transitions. Word has length 69 [2020-12-22 06:29:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:23,685 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 878 transitions. [2020-12-22 06:29:23,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 878 transitions. [2020-12-22 06:29:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:29:23,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:23,689 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 06:29:23,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:29:23,690 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:23,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1972260837, now seen corresponding path program 1 times [2020-12-22 06:29:23,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:23,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759130724] [2020-12-22 06:29:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:23,806 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 06:29:23,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759130724] [2020-12-22 06:29:23,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:23,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:23,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985135790] [2020-12-22 06:29:23,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:23,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:23,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:23,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:23,809 INFO L87 Difference]: Start difference. First operand 507 states and 878 transitions. Second operand 3 states. [2020-12-22 06:29:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:23,901 INFO L93 Difference]: Finished difference Result 1407 states and 2458 transitions. [2020-12-22 06:29:23,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:23,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 06:29:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:23,907 INFO L225 Difference]: With dead ends: 1407 [2020-12-22 06:29:23,907 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 06:29:23,910 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 06:29:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 06:29:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 667. [2020-12-22 06:29:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-12-22 06:29:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1171 transitions. [2020-12-22 06:29:23,963 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1171 transitions. Word has length 77 [2020-12-22 06:29:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:23,964 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 1171 transitions. [2020-12-22 06:29:23,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1171 transitions. [2020-12-22 06:29:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 06:29:23,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:23,967 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 06:29:23,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:29:23,971 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1586972284, now seen corresponding path program 1 times [2020-12-22 06:29:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:23,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250388990] [2020-12-22 06:29:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:24,085 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 06:29:24,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250388990] [2020-12-22 06:29:24,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:24,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:29:24,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408091141] [2020-12-22 06:29:24,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:29:24,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:29:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:24,094 INFO L87 Difference]: Start difference. First operand 667 states and 1171 transitions. Second operand 5 states. [2020-12-22 06:29:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:24,346 INFO L93 Difference]: Finished difference Result 1931 states and 3419 transitions. [2020-12-22 06:29:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:29:24,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-12-22 06:29:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:24,355 INFO L225 Difference]: With dead ends: 1931 [2020-12-22 06:29:24,355 INFO L226 Difference]: Without dead ends: 1295 [2020-12-22 06:29:24,357 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 06:29:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2020-12-22 06:29:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 667. [2020-12-22 06:29:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-12-22 06:29:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1169 transitions. [2020-12-22 06:29:24,412 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1169 transitions. Word has length 78 [2020-12-22 06:29:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:24,413 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 1169 transitions. [2020-12-22 06:29:24,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1169 transitions. [2020-12-22 06:29:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:29:24,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:24,415 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 06:29:24,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:29:24,416 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:24,416 INFO L82 PathProgramCache]: Analyzing trace with hash 413167387, now seen corresponding path program 1 times [2020-12-22 06:29:24,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:24,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440985895] [2020-12-22 06:29:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:24,503 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 06:29:24,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440985895] [2020-12-22 06:29:24,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:24,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999921515] [2020-12-22 06:29:24,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:24,506 INFO L87 Difference]: Start difference. First operand 667 states and 1169 transitions. Second operand 3 states. [2020-12-22 06:29:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:24,602 INFO L93 Difference]: Finished difference Result 1929 states and 3411 transitions. [2020-12-22 06:29:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:24,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 06:29:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:24,611 INFO L225 Difference]: With dead ends: 1929 [2020-12-22 06:29:24,611 INFO L226 Difference]: Without dead ends: 1293 [2020-12-22 06:29:24,613 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 06:29:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2020-12-22 06:29:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1029. [2020-12-22 06:29:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2020-12-22 06:29:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1832 transitions. [2020-12-22 06:29:24,702 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1832 transitions. Word has length 79 [2020-12-22 06:29:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:24,703 INFO L481 AbstractCegarLoop]: Abstraction has 1029 states and 1832 transitions. [2020-12-22 06:29:24,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1832 transitions. [2020-12-22 06:29:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:29:24,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:24,706 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 06:29:24,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:29:24,706 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1714985017, now seen corresponding path program 1 times [2020-12-22 06:29:24,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:24,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878569975] [2020-12-22 06:29:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:24,828 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 06:29:24,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878569975] [2020-12-22 06:29:24,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578745877] [2020-12-22 06:29:24,829 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 06:29:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:29:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:29:25,365 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 06:29:25,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:29:25,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:29:25,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051364401] [2020-12-22 06:29:25,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:29:25,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:29:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:25,376 INFO L87 Difference]: Start difference. First operand 1029 states and 1832 transitions. Second operand 5 states. [2020-12-22 06:29:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:25,606 INFO L93 Difference]: Finished difference Result 1776 states and 3124 transitions. [2020-12-22 06:29:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:29:25,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-12-22 06:29:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:25,616 INFO L225 Difference]: With dead ends: 1776 [2020-12-22 06:29:25,616 INFO L226 Difference]: Without dead ends: 1512 [2020-12-22 06:29:25,617 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 06:29:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2020-12-22 06:29:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1245. [2020-12-22 06:29:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2020-12-22 06:29:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 2222 transitions. [2020-12-22 06:29:25,738 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 2222 transitions. Word has length 79 [2020-12-22 06:29:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:25,738 INFO L481 AbstractCegarLoop]: Abstraction has 1245 states and 2222 transitions. [2020-12-22 06:29:25,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 2222 transitions. [2020-12-22 06:29:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 06:29:25,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:25,742 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 06:29:25,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:29:25,958 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 591241206, now seen corresponding path program 1 times [2020-12-22 06:29:25,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:25,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541115591] [2020-12-22 06:29:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:26,066 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 06:29:26,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541115591] [2020-12-22 06:29:26,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:26,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:26,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440147684] [2020-12-22 06:29:26,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:26,068 INFO L87 Difference]: Start difference. First operand 1245 states and 2222 transitions. Second operand 3 states. [2020-12-22 06:29:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:26,208 INFO L93 Difference]: Finished difference Result 3369 states and 6040 transitions. [2020-12-22 06:29:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:26,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 06:29:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:26,224 INFO L225 Difference]: With dead ends: 3369 [2020-12-22 06:29:26,224 INFO L226 Difference]: Without dead ends: 2225 [2020-12-22 06:29:26,227 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 06:29:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-12-22 06:29:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1961. [2020-12-22 06:29:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2020-12-22 06:29:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3527 transitions. [2020-12-22 06:29:26,368 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3527 transitions. Word has length 83 [2020-12-22 06:29:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:26,370 INFO L481 AbstractCegarLoop]: Abstraction has 1961 states and 3527 transitions. [2020-12-22 06:29:26,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3527 transitions. [2020-12-22 06:29:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 06:29:26,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:26,376 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 06:29:26,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:29:26,376 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash -529031818, now seen corresponding path program 1 times [2020-12-22 06:29:26,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:26,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402024843] [2020-12-22 06:29:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:26,467 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 06:29:26,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402024843] [2020-12-22 06:29:26,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:26,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:26,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336978541] [2020-12-22 06:29:26,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:26,475 INFO L87 Difference]: Start difference. First operand 1961 states and 3527 transitions. Second operand 3 states. [2020-12-22 06:29:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:26,696 INFO L93 Difference]: Finished difference Result 5253 states and 9474 transitions. [2020-12-22 06:29:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:26,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 06:29:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:26,763 INFO L225 Difference]: With dead ends: 5253 [2020-12-22 06:29:26,763 INFO L226 Difference]: Without dead ends: 3427 [2020-12-22 06:29:26,766 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 06:29:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2020-12-22 06:29:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3163. [2020-12-22 06:29:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3163 states. [2020-12-22 06:29:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 5712 transitions. [2020-12-22 06:29:26,971 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 5712 transitions. Word has length 84 [2020-12-22 06:29:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:26,971 INFO L481 AbstractCegarLoop]: Abstraction has 3163 states and 5712 transitions. [2020-12-22 06:29:26,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 5712 transitions. [2020-12-22 06:29:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 06:29:26,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:26,985 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 06:29:26,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:29:26,985 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash 637069287, now seen corresponding path program 1 times [2020-12-22 06:29:26,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:26,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431298041] [2020-12-22 06:29:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:27,067 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 06:29:27,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431298041] [2020-12-22 06:29:27,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:27,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:27,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371924284] [2020-12-22 06:29:27,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:27,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:27,071 INFO L87 Difference]: Start difference. First operand 3163 states and 5712 transitions. Second operand 3 states. [2020-12-22 06:29:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:27,435 INFO L93 Difference]: Finished difference Result 8575 states and 15512 transitions. [2020-12-22 06:29:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:27,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 06:29:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:27,484 INFO L225 Difference]: With dead ends: 8575 [2020-12-22 06:29:27,484 INFO L226 Difference]: Without dead ends: 5581 [2020-12-22 06:29:27,490 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 06:29:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5581 states. [2020-12-22 06:29:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5581 to 5317. [2020-12-22 06:29:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5317 states. [2020-12-22 06:29:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 9617 transitions. [2020-12-22 06:29:27,956 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 9617 transitions. Word has length 85 [2020-12-22 06:29:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:27,957 INFO L481 AbstractCegarLoop]: Abstraction has 5317 states and 9617 transitions. [2020-12-22 06:29:27,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 9617 transitions. [2020-12-22 06:29:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 06:29:27,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:27,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:29:27,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:29:27,969 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash -85586873, now seen corresponding path program 1 times [2020-12-22 06:29:27,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:27,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628254886] [2020-12-22 06:29:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:28,065 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 06:29:28,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628254886] [2020-12-22 06:29:28,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:28,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:28,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229368114] [2020-12-22 06:29:28,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:28,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:28,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:28,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:28,071 INFO L87 Difference]: Start difference. First operand 5317 states and 9617 transitions. Second operand 3 states. [2020-12-22 06:29:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:28,658 INFO L93 Difference]: Finished difference Result 15495 states and 28069 transitions. [2020-12-22 06:29:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:28,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 06:29:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:28,763 INFO L225 Difference]: With dead ends: 15495 [2020-12-22 06:29:28,763 INFO L226 Difference]: Without dead ends: 10351 [2020-12-22 06:29:28,775 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 06:29:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2020-12-22 06:29:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 10087. [2020-12-22 06:29:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10087 states. [2020-12-22 06:29:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 18258 transitions. [2020-12-22 06:29:29,474 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 18258 transitions. Word has length 86 [2020-12-22 06:29:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:29,475 INFO L481 AbstractCegarLoop]: Abstraction has 10087 states and 18258 transitions. [2020-12-22 06:29:29,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 18258 transitions. [2020-12-22 06:29:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 06:29:29,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:29,492 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 06:29:29,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:29:29,492 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1094125290, now seen corresponding path program 1 times [2020-12-22 06:29:29,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:29,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41125846] [2020-12-22 06:29:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:29,575 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 06:29:29,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41125846] [2020-12-22 06:29:29,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:29,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:29,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685873261] [2020-12-22 06:29:29,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:29,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:29,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:29,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:29,578 INFO L87 Difference]: Start difference. First operand 10087 states and 18258 transitions. Second operand 3 states. [2020-12-22 06:29:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:30,800 INFO L93 Difference]: Finished difference Result 29507 states and 53467 transitions. [2020-12-22 06:29:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:30,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 06:29:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:30,879 INFO L225 Difference]: With dead ends: 29507 [2020-12-22 06:29:30,879 INFO L226 Difference]: Without dead ends: 19601 [2020-12-22 06:29:30,897 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 06:29:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2020-12-22 06:29:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 19337. [2020-12-22 06:29:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19337 states. [2020-12-22 06:29:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 34995 transitions. [2020-12-22 06:29:32,062 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 34995 transitions. Word has length 87 [2020-12-22 06:29:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:32,063 INFO L481 AbstractCegarLoop]: Abstraction has 19337 states and 34995 transitions. [2020-12-22 06:29:32,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 34995 transitions. [2020-12-22 06:29:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 06:29:32,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:32,085 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 06:29:32,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:29:32,085 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:32,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1408509833, now seen corresponding path program 1 times [2020-12-22 06:29:32,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:32,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073726056] [2020-12-22 06:29:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:32,154 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 06:29:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073726056] [2020-12-22 06:29:32,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:32,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492852481] [2020-12-22 06:29:32,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:32,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:32,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:32,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:32,156 INFO L87 Difference]: Start difference. First operand 19337 states and 34995 transitions. Second operand 3 states. [2020-12-22 06:29:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:33,669 INFO L93 Difference]: Finished difference Result 57443 states and 103992 transitions. [2020-12-22 06:29:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:33,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-22 06:29:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:33,793 INFO L225 Difference]: With dead ends: 57443 [2020-12-22 06:29:33,793 INFO L226 Difference]: Without dead ends: 38291 [2020-12-22 06:29:33,823 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 06:29:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38291 states. [2020-12-22 06:29:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38291 to 38027. [2020-12-22 06:29:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38027 states. [2020-12-22 06:29:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38027 states to 38027 states and 68724 transitions. [2020-12-22 06:29:36,608 INFO L78 Accepts]: Start accepts. Automaton has 38027 states and 68724 transitions. Word has length 88 [2020-12-22 06:29:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:36,608 INFO L481 AbstractCegarLoop]: Abstraction has 38027 states and 68724 transitions. [2020-12-22 06:29:36,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 38027 states and 68724 transitions. [2020-12-22 06:29:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:29:36,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:36,652 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 06:29:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:29:36,652 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 364431197, now seen corresponding path program 1 times [2020-12-22 06:29:36,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874014541] [2020-12-22 06:29:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:36,752 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 06:29:36,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874014541] [2020-12-22 06:29:36,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:36,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:29:36,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860031392] [2020-12-22 06:29:36,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:29:36,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:29:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:36,758 INFO L87 Difference]: Start difference. First operand 38027 states and 68724 transitions. Second operand 5 states. [2020-12-22 06:29:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:39,708 INFO L93 Difference]: Finished difference Result 111784 states and 201985 transitions. [2020-12-22 06:29:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:29:39,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-12-22 06:29:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:39,914 INFO L225 Difference]: With dead ends: 111784 [2020-12-22 06:29:39,914 INFO L226 Difference]: Without dead ends: 74010 [2020-12-22 06:29:39,982 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 06:29:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74010 states. [2020-12-22 06:29:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74010 to 38027. [2020-12-22 06:29:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38027 states. [2020-12-22 06:29:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38027 states to 38027 states and 68466 transitions. [2020-12-22 06:29:42,072 INFO L78 Accepts]: Start accepts. Automaton has 38027 states and 68466 transitions. Word has length 89 [2020-12-22 06:29:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:42,072 INFO L481 AbstractCegarLoop]: Abstraction has 38027 states and 68466 transitions. [2020-12-22 06:29:42,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 38027 states and 68466 transitions. [2020-12-22 06:29:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:29:42,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:42,096 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 06:29:42,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:29:42,097 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1666248827, now seen corresponding path program 2 times [2020-12-22 06:29:42,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:42,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129881778] [2020-12-22 06:29:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:42,185 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 06:29:42,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129881778] [2020-12-22 06:29:42,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:42,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:29:42,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975691944] [2020-12-22 06:29:42,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:29:42,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:29:42,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:29:42,188 INFO L87 Difference]: Start difference. First operand 38027 states and 68466 transitions. Second operand 5 states. [2020-12-22 06:29:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:43,896 INFO L93 Difference]: Finished difference Result 76059 states and 136946 transitions. [2020-12-22 06:29:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:29:43,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-12-22 06:29:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:43,970 INFO L225 Difference]: With dead ends: 76059 [2020-12-22 06:29:43,970 INFO L226 Difference]: Without dead ends: 38291 [2020-12-22 06:29:44,003 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 06:29:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38291 states. [2020-12-22 06:29:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38291 to 38027. [2020-12-22 06:29:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38027 states. [2020-12-22 06:29:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38027 states to 38027 states and 68338 transitions. [2020-12-22 06:29:45,871 INFO L78 Accepts]: Start accepts. Automaton has 38027 states and 68338 transitions. Word has length 89 [2020-12-22 06:29:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:45,871 INFO L481 AbstractCegarLoop]: Abstraction has 38027 states and 68338 transitions. [2020-12-22 06:29:45,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:29:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38027 states and 68338 transitions. [2020-12-22 06:29:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:29:45,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:45,896 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 06:29:45,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:29:45,896 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:45,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:45,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1957193240, now seen corresponding path program 1 times [2020-12-22 06:29:45,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:45,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810686934] [2020-12-22 06:29:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:45,972 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 06:29:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810686934] [2020-12-22 06:29:45,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:45,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:45,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298676532] [2020-12-22 06:29:45,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:45,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:45,975 INFO L87 Difference]: Start difference. First operand 38027 states and 68338 transitions. Second operand 3 states. [2020-12-22 06:29:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:48,586 INFO L93 Difference]: Finished difference Result 105669 states and 189628 transitions. [2020-12-22 06:29:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:48,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 06:29:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:48,715 INFO L225 Difference]: With dead ends: 105669 [2020-12-22 06:29:48,716 INFO L226 Difference]: Without dead ends: 67861 [2020-12-22 06:29:48,757 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 06:29:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67861 states. [2020-12-22 06:29:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67861 to 67597. [2020-12-22 06:29:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67597 states. [2020-12-22 06:29:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67597 states to 67597 states and 120947 transitions. [2020-12-22 06:29:52,447 INFO L78 Accepts]: Start accepts. Automaton has 67597 states and 120947 transitions. Word has length 89 [2020-12-22 06:29:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:52,448 INFO L481 AbstractCegarLoop]: Abstraction has 67597 states and 120947 transitions. [2020-12-22 06:29:52,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 67597 states and 120947 transitions. [2020-12-22 06:29:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 06:29:52,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:52,469 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 06:29:52,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:29:52,470 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash -245077055, now seen corresponding path program 1 times [2020-12-22 06:29:52,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:52,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653352118] [2020-12-22 06:29:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:52,801 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-22 06:29:52,921 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 06:29:52,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653352118] [2020-12-22 06:29:52,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:52,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 06:29:52,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617733087] [2020-12-22 06:29:52,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:29:52,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:29:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:29:52,923 INFO L87 Difference]: Start difference. First operand 67597 states and 120947 transitions. Second operand 9 states. [2020-12-22 06:29:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:58,969 INFO L93 Difference]: Finished difference Result 136549 states and 244154 transitions. [2020-12-22 06:29:58,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 06:29:58,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-12-22 06:29:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:59,373 INFO L225 Difference]: With dead ends: 136549 [2020-12-22 06:29:59,374 INFO L226 Difference]: Without dead ends: 136316 [2020-12-22 06:29:59,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2020-12-22 06:29:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136316 states. [2020-12-22 06:30:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136316 to 134915. [2020-12-22 06:30:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134915 states. [2020-12-22 06:30:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134915 states to 134915 states and 241430 transitions. [2020-12-22 06:30:06,108 INFO L78 Accepts]: Start accepts. Automaton has 134915 states and 241430 transitions. Word has length 90 [2020-12-22 06:30:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:06,109 INFO L481 AbstractCegarLoop]: Abstraction has 134915 states and 241430 transitions. [2020-12-22 06:30:06,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:30:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 134915 states and 241430 transitions. [2020-12-22 06:30:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 06:30:06,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:06,142 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 06:30:06,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:30:06,142 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:06,143 INFO L82 PathProgramCache]: Analyzing trace with hash -375469244, now seen corresponding path program 1 times [2020-12-22 06:30:06,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:06,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962343822] [2020-12-22 06:30:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:06,252 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 06:30:06,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962343822] [2020-12-22 06:30:06,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:06,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:30:06,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581101988] [2020-12-22 06:30:06,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:30:06,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:06,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:30:06,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:30:06,254 INFO L87 Difference]: Start difference. First operand 134915 states and 241430 transitions. Second operand 7 states. [2020-12-22 06:30:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:11,590 INFO L93 Difference]: Finished difference Result 135460 states and 242333 transitions. [2020-12-22 06:30:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:30:11,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-12-22 06:30:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:11,861 INFO L225 Difference]: With dead ends: 135460 [2020-12-22 06:30:11,862 INFO L226 Difference]: Without dead ends: 135088 [2020-12-22 06:30:11,902 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 06:30:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135088 states. [2020-12-22 06:30:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135088 to 134903. [2020-12-22 06:30:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134903 states. [2020-12-22 06:30:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134903 states to 134903 states and 241403 transitions. [2020-12-22 06:30:18,406 INFO L78 Accepts]: Start accepts. Automaton has 134903 states and 241403 transitions. Word has length 91 [2020-12-22 06:30:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:18,407 INFO L481 AbstractCegarLoop]: Abstraction has 134903 states and 241403 transitions. [2020-12-22 06:30:18,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:30:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 134903 states and 241403 transitions. [2020-12-22 06:30:18,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 06:30:18,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:18,444 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 06:30:18,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:30:18,444 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1536439268, now seen corresponding path program 1 times [2020-12-22 06:30:18,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:18,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275810841] [2020-12-22 06:30:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:18,907 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 06:30:18,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275810841] [2020-12-22 06:30:18,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:18,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 06:30:18,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943849538] [2020-12-22 06:30:18,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:30:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:18,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:30:18,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:30:18,909 INFO L87 Difference]: Start difference. First operand 134903 states and 241403 transitions. Second operand 9 states. [2020-12-22 06:30:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:29,863 INFO L93 Difference]: Finished difference Result 272272 states and 486851 transitions. [2020-12-22 06:30:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 06:30:29,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 06:30:29,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:30,638 INFO L225 Difference]: With dead ends: 272272 [2020-12-22 06:30:30,639 INFO L226 Difference]: Without dead ends: 271912 [2020-12-22 06:30:30,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:30:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271912 states. [2020-12-22 06:30:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271912 to 269444. [2020-12-22 06:30:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269444 states. [2020-12-22 06:30:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269444 states to 269444 states and 482197 transitions. [2020-12-22 06:30:43,580 INFO L78 Accepts]: Start accepts. Automaton has 269444 states and 482197 transitions. Word has length 91 [2020-12-22 06:30:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:43,580 INFO L481 AbstractCegarLoop]: Abstraction has 269444 states and 482197 transitions. [2020-12-22 06:30:43,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:30:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 269444 states and 482197 transitions. [2020-12-22 06:30:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 06:30:43,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:43,656 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 06:30:43,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:30:43,657 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1513807014, now seen corresponding path program 1 times [2020-12-22 06:30:43,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:43,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66257819] [2020-12-22 06:30:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:44,286 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 06:30:44,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66257819] [2020-12-22 06:30:44,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:44,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:30:44,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550127021] [2020-12-22 06:30:44,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:30:44,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:44,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:30:44,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:30:44,291 INFO L87 Difference]: Start difference. First operand 269444 states and 482197 transitions. Second operand 9 states. [2020-12-22 06:30:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:55,126 INFO L93 Difference]: Finished difference Result 272354 states and 487032 transitions. [2020-12-22 06:30:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:30:55,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 06:30:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:55,917 INFO L225 Difference]: With dead ends: 272354 [2020-12-22 06:30:55,917 INFO L226 Difference]: Without dead ends: 271823 [2020-12-22 06:30:55,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-12-22 06:30:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271823 states. [2020-12-22 06:31:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271823 to 269499. [2020-12-22 06:31:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269499 states. [2020-12-22 06:31:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269499 states to 269499 states and 482282 transitions. [2020-12-22 06:31:09,498 INFO L78 Accepts]: Start accepts. Automaton has 269499 states and 482282 transitions. Word has length 91 [2020-12-22 06:31:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:31:09,504 INFO L481 AbstractCegarLoop]: Abstraction has 269499 states and 482282 transitions. [2020-12-22 06:31:09,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:31:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 269499 states and 482282 transitions. [2020-12-22 06:31:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 06:31:09,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:31:09,575 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 06:31:09,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:31:09,576 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:31:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:31:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1401159743, now seen corresponding path program 1 times [2020-12-22 06:31:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:31:09,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875452411] [2020-12-22 06:31:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:31:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:31:09,813 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 06:31:09,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875452411] [2020-12-22 06:31:09,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:31:09,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:31:09,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522916169] [2020-12-22 06:31:09,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:31:09,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:31:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:31:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:31:09,816 INFO L87 Difference]: Start difference. First operand 269499 states and 482282 transitions. Second operand 5 states.