/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/loop-acceleration/array_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:21:57,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:21:57,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:21:57,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:21:57,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:21:57,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:21:57,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:21:57,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:21:57,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:21:57,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:21:57,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:21:57,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:21:57,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:21:57,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:21:57,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:21:57,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:21:57,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:21:57,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:21:57,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:21:57,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:21:57,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:21:57,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:21:57,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:21:57,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:21:57,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:21:57,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:21:57,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:21:57,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:21:57,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:21:57,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:21:57,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:21:57,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:21:57,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:21:57,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:21:57,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:21:57,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:21:57,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:21:57,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:21:57,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:21:57,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:21:57,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:21:57,354 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:21:57,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:21:57,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:21:57,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:21:57,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:21:57,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:21:57,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:21:57,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:21:57,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:21:57,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:21:57,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:21:57,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:21:57,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:21:57,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:57,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:21:57,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:21:57,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:21:57,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:21:57,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:21:57,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:21:57,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:21:57,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:21:57,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:21:57,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:21:57,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:21:57,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:21:57,762 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:21:57,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2020-12-22 04:21:57,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087cc2f5d/290d53f1e8634ca1817580aaf586df27/FLAGe499c22c6 [2020-12-22 04:21:58,491 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:21:58,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2020-12-22 04:21:58,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087cc2f5d/290d53f1e8634ca1817580aaf586df27/FLAGe499c22c6 [2020-12-22 04:21:58,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087cc2f5d/290d53f1e8634ca1817580aaf586df27 [2020-12-22 04:21:58,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:21:58,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:21:58,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:58,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:21:58,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:21:58,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:58" (1/1) ... [2020-12-22 04:21:58,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee28c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:58, skipping insertion in model container [2020-12-22 04:21:58,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:58" (1/1) ... [2020-12-22 04:21:58,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:21:58,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:21:59,127 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/loop-acceleration/array_2-1-simple.i[809,822] [2020-12-22 04:21:59,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:59,163 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:21:59,179 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/loop-acceleration/array_2-1-simple.i[809,822] [2020-12-22 04:21:59,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:59,211 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:21:59,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59 WrapperNode [2020-12-22 04:21:59,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:59,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:59,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:21:59,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:21:59,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:59,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:21:59,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:21:59,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:21:59,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (1/1) ... [2020-12-22 04:21:59,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:21:59,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:21:59,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:21:59,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:21:59,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (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 04:21:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:21:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 04:21:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:21:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:21:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:21:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:21:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:21:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:21:59,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:21:59,679 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:21:59,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:59 BoogieIcfgContainer [2020-12-22 04:21:59,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:21:59,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:21:59,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:21:59,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:21:59,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:21:58" (1/3) ... [2020-12-22 04:21:59,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b397780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:59, skipping insertion in model container [2020-12-22 04:21:59,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:59" (2/3) ... [2020-12-22 04:21:59,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b397780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:59, skipping insertion in model container [2020-12-22 04:21:59,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:59" (3/3) ... [2020-12-22 04:21:59,694 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2020-12-22 04:21:59,702 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:21:59,708 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:21:59,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:21:59,803 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:21:59,803 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:21:59,803 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:21:59,803 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:21:59,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:21:59,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:21:59,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:21:59,833 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:21:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 04:21:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:21:59,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:59,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:21:59,897 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:59,915 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-22 04:21:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:59,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171520978] [2020-12-22 04:21:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:00,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171520978] [2020-12-22 04:22:00,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:00,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:22:00,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611468279] [2020-12-22 04:22:00,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:22:00,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:00,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:22:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:22:00,178 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-22 04:22:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:00,212 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-22 04:22:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:22:00,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:22:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:00,223 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:22:00,224 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:22:00,227 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 04:22:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:22:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-22 04:22:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:22:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:22:00,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-22 04:22:00,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:00,265 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:22:00,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:22:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:22:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:22:00,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:00,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:00,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:22:00,267 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-22 04:22:00,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:00,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911929475] [2020-12-22 04:22:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:00,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911929475] [2020-12-22 04:22:00,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632564050] [2020-12-22 04:22:00,329 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 04:22:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:22:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:00,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:00,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:22:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61433248] [2020-12-22 04:22:00,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:22:00,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:00,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:22:00,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:00,522 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-22 04:22:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:00,550 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:22:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:22:00,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:22:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:00,552 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:22:00,552 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:22:00,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 04:22:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:22:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:22:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:22:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:22:00,557 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-22 04:22:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:00,558 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:22:00,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:22:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:22:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:22:00,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:00,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:00,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:22:00,773 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:00,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-22 04:22:00,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:00,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222006191] [2020-12-22 04:22:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:00,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222006191] [2020-12-22 04:22:00,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741270106] [2020-12-22 04:22:00,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:00,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:00,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:22:00,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:00,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:00,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:22:00,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825034622] [2020-12-22 04:22:00,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:22:00,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:22:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:22:00,989 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-22 04:22:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:01,012 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:22:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:22:01,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:22:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:01,013 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:22:01,013 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:22:01,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:22:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:22:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-22 04:22:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:22:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:22:01,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-22 04:22:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:01,019 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:22:01,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:22:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:22:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:22:01,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:01,020 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:01,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:01,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-22 04:22:01,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:01,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980175783] [2020-12-22 04:22:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:01,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980175783] [2020-12-22 04:22:01,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444836999] [2020-12-22 04:22:01,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:01,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:22:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:22:01,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:01,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:01,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:22:01,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410651545] [2020-12-22 04:22:01,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:22:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:01,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:22:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:01,418 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-22 04:22:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:01,443 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:22:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:22:01,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 04:22:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:01,445 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:22:01,445 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:22:01,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:22:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:22:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:22:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:22:01,450 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-22 04:22:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:01,451 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:22:01,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:22:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:22:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:22:01,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:01,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:01,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:01,667 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:01,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-12-22 04:22:01,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:01,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784800488] [2020-12-22 04:22:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:01,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784800488] [2020-12-22 04:22:01,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896347168] [2020-12-22 04:22:01,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:01,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:22:01,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:01,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:01,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:22:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048797801] [2020-12-22 04:22:01,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:22:01,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:22:01,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:22:01,904 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-12-22 04:22:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:01,964 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:22:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:22:01,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:22:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:01,966 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:22:01,966 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:22:01,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:22:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:22:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:22:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:22:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:22:01,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-22 04:22:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:01,971 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:22:01,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:22:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:22:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:22:01,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:01,973 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:02,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:02,187 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:02,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-12-22 04:22:02,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:02,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470962910] [2020-12-22 04:22:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:02,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470962910] [2020-12-22 04:22:02,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437974002] [2020-12-22 04:22:02,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:02,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:22:02,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:02,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:22:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:02,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:02,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:22:02,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178777358] [2020-12-22 04:22:02,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:22:02,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:22:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:02,381 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-22 04:22:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:02,417 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:22:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:22:02,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:22:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:02,418 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:22:02,418 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:22:02,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:22:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:22:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:22:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:22:02,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-22 04:22:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:02,424 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:22:02,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:22:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:22:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:22:02,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:02,425 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:02,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:22:02,641 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-12-22 04:22:02,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:02,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660977979] [2020-12-22 04:22:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:02,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660977979] [2020-12-22 04:22:02,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817649240] [2020-12-22 04:22:02,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:02,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:22:02,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:22:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:02,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:02,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:22:02,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439849911] [2020-12-22 04:22:02,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:22:02,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:22:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:22:02,889 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-22 04:22:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:02,924 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:22:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:22:02,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:22:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:02,925 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:22:02,925 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:22:02,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:22:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:22:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:22:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:22:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:22:02,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-22 04:22:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:02,931 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:22:02,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:22:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:22:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:22:02,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:02,932 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:03,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:03,139 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:03,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-12-22 04:22:03,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:03,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318377105] [2020-12-22 04:22:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:03,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318377105] [2020-12-22 04:22:03,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063895781] [2020-12-22 04:22:03,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:22:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:03,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:03,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:22:03,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150456289] [2020-12-22 04:22:03,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:22:03,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:22:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:22:03,397 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-22 04:22:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:03,439 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:22:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:22:03,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-22 04:22:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:03,449 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:22:03,449 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:22:03,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:22:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:22:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:22:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:22:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:22:03,463 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-22 04:22:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:03,463 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:22:03,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:22:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:22:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:22:03,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:03,465 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:03,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:03,666 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:03,667 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-12-22 04:22:03,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:03,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421203475] [2020-12-22 04:22:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:03,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421203475] [2020-12-22 04:22:03,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520618114] [2020-12-22 04:22:03,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:03,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:22:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:03,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:03,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:22:03,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061676617] [2020-12-22 04:22:03,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:22:03,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:22:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:22:03,904 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-22 04:22:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:03,942 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:22:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:22:03,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-22 04:22:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:03,943 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:22:03,943 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:22:03,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:22:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:22:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-22 04:22:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:22:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:22:03,948 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-22 04:22:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:03,948 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:22:03,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:22:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:22:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:22:03,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:03,949 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:04,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:22:04,166 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-12-22 04:22:04,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:04,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649662930] [2020-12-22 04:22:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649662930] [2020-12-22 04:22:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711969000] [2020-12-22 04:22:04,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:04,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:22:04,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:22:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:04,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:04,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:22:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771555319] [2020-12-22 04:22:04,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:22:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:22:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:22:04,493 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-22 04:22:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:04,544 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:22:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:22:04,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-22 04:22:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:04,546 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:22:04,546 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:22:04,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:22:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:22:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:22:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:22:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:22:04,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-22 04:22:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:04,551 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:22:04,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:22:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:22:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:22:04,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:04,552 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:04,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:04,768 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-12-22 04:22:04,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:04,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953283147] [2020-12-22 04:22:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:04,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953283147] [2020-12-22 04:22:04,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327860756] [2020-12-22 04:22:04,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:05,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:22:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:05,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:22:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135849971] [2020-12-22 04:22:05,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:22:05,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:22:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:22:05,068 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-12-22 04:22:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:05,141 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:22:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:22:05,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-22 04:22:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:05,143 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:22:05,143 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:22:05,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:22:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:22:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:22:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:22:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:22:05,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-22 04:22:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:05,150 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:22:05,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:22:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:22:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:22:05,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:05,152 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:05,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:05,368 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-12-22 04:22:05,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:05,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415433922] [2020-12-22 04:22:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415433922] [2020-12-22 04:22:05,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633191562] [2020-12-22 04:22:05,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:05,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:22:05,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:05,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:22:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:05,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:05,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:22:05,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512610019] [2020-12-22 04:22:05,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:22:05,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:22:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:22:05,694 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-22 04:22:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:05,744 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:22:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:22:05,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-22 04:22:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:05,745 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:22:05,745 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:22:05,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:22:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:22:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 04:22:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:22:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:22:05,750 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-22 04:22:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:05,750 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:22:05,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:22:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:22:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:22:05,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:05,751 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:05,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:22:05,965 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-12-22 04:22:05,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:05,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124274634] [2020-12-22 04:22:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:06,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124274634] [2020-12-22 04:22:06,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331463309] [2020-12-22 04:22:06,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:06,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:22:06,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:06,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:22:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:06,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:06,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:22:06,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883126210] [2020-12-22 04:22:06,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:22:06,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:06,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:22:06,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:22:06,392 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-22 04:22:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:06,447 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:22:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:22:06,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:22:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:06,449 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:22:06,449 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:22:06,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:22:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:22:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 04:22:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:22:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:22:06,468 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-22 04:22:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:06,469 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:22:06,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:22:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:22:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:22:06,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:06,470 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:06,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:22:06,684 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:06,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-12-22 04:22:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:06,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35057991] [2020-12-22 04:22:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35057991] [2020-12-22 04:22:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559252124] [2020-12-22 04:22:06,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:22:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:07,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:07,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:22:07,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079690111] [2020-12-22 04:22:07,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:22:07,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:22:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:22:07,019 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-22 04:22:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:07,070 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:22:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:22:07,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:22:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:07,072 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:22:07,072 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:22:07,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:22:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:22:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:22:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:22:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:22:07,076 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-22 04:22:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:07,076 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:22:07,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:22:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:22:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:22:07,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:07,077 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:07,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:22:07,278 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:07,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-12-22 04:22:07,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:07,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116782608] [2020-12-22 04:22:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:07,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116782608] [2020-12-22 04:22:07,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379774133] [2020-12-22 04:22:07,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:07,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:07,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:22:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:07,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:07,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:22:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618655349] [2020-12-22 04:22:07,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:22:07,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:07,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:22:07,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:22:07,688 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-22 04:22:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:07,756 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:22:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:22:07,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-22 04:22:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:07,758 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:22:07,758 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:22:07,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:22:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:22:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:22:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:22:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:22:07,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-22 04:22:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:07,764 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:22:07,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:22:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:22:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:22:07,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:07,765 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:07,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:07,972 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-12-22 04:22:07,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:07,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747324620] [2020-12-22 04:22:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:08,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747324620] [2020-12-22 04:22:08,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635640840] [2020-12-22 04:22:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:08,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:22:08,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:08,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:22:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:08,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:08,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:22:08,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910247563] [2020-12-22 04:22:08,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:22:08,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:08,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:22:08,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:22:08,508 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-22 04:22:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:08,577 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:22:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:22:08,578 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-22 04:22:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:08,579 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:22:08,579 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:22:08,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:22:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:22:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 04:22:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:22:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:22:08,588 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-22 04:22:08,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:08,588 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:22:08,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:22:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:22:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:22:08,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:08,589 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:08,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:22:08,796 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:08,796 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-12-22 04:22:08,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:08,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145573489] [2020-12-22 04:22:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:09,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145573489] [2020-12-22 04:22:09,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401668277] [2020-12-22 04:22:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:09,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:09,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:22:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:09,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:09,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:22:09,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464191782] [2020-12-22 04:22:09,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:22:09,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:09,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:22:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:22:09,229 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-12-22 04:22:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:09,298 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:22:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:22:09,299 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-22 04:22:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:09,300 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:22:09,300 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:22:09,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:22:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:22:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:22:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:22:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:22:09,305 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-22 04:22:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:09,305 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:22:09,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:22:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:22:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:22:09,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:09,306 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:09,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:22:09,522 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-12-22 04:22:09,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:09,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282735878] [2020-12-22 04:22:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282735878] [2020-12-22 04:22:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600343741] [2020-12-22 04:22:09,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:09,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:22:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:22:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:10,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:10,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:22:10,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812611375] [2020-12-22 04:22:10,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:22:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:10,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:22:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:10,081 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-22 04:22:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:10,163 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:22:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:22:10,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:22:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:10,164 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:22:10,164 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:22:10,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:22:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:22:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:22:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:22:10,170 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-22 04:22:10,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:10,171 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:22:10,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:22:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:22:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:22:10,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:10,172 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:10,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:22:10,387 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-12-22 04:22:10,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:10,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524017784] [2020-12-22 04:22:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524017784] [2020-12-22 04:22:10,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902785039] [2020-12-22 04:22:10,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:11,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:22:11,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:22:11,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:11,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:11,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:22:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386303954] [2020-12-22 04:22:11,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:22:11,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:11,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:22:11,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:22:11,247 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-22 04:22:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:11,324 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:22:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:22:11,325 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-22 04:22:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:11,326 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:22:11,326 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:22:11,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:22:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:22:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-22 04:22:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:22:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:22:11,331 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-22 04:22:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:11,332 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:22:11,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:22:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:22:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:22:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:11,333 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:11,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:11,549 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:11,549 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-12-22 04:22:11,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:11,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281398818] [2020-12-22 04:22:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:11,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281398818] [2020-12-22 04:22:11,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715350355] [2020-12-22 04:22:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:11,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:22:11,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:12,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:12,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:22:12,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990314424] [2020-12-22 04:22:12,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:22:12,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:12,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:22:12,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:22:12,054 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-22 04:22:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:12,144 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:22:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:22:12,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-22 04:22:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:12,146 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:22:12,146 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:22:12,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:22:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:22:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:22:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:22:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:22:12,151 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-22 04:22:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:12,152 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:22:12,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:22:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:22:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:22:12,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:12,153 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:12,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:12,367 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-12-22 04:22:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:12,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497203330] [2020-12-22 04:22:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:12,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497203330] [2020-12-22 04:22:12,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439032031] [2020-12-22 04:22:12,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:12,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:12,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:12,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:22:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:12,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:12,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:22:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767868624] [2020-12-22 04:22:12,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:22:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:22:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:22:12,917 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-22 04:22:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:12,992 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:22:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:22:12,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:22:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:12,994 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:22:12,994 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:22:12,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:22:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:22:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:22:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:22:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:22:12,998 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-22 04:22:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:12,999 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:22:12,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:22:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:22:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:22:12,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:13,000 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:13,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:22:13,214 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-12-22 04:22:13,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:13,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223896039] [2020-12-22 04:22:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:13,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223896039] [2020-12-22 04:22:13,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109070648] [2020-12-22 04:22:13,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:14,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:22:14,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:22:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:14,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:22:14,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466969047] [2020-12-22 04:22:14,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:22:14,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:22:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:22:14,204 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-22 04:22:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,296 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:22:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:22:14,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:22:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,297 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:22:14,297 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:22:14,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:22:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:22:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:22:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:22:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:22:14,303 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-22 04:22:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,303 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:22:14,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:22:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:22:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:22:14,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,304 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:22:14,518 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-12-22 04:22:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634240601] [2020-12-22 04:22:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634240601] [2020-12-22 04:22:14,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552419383] [2020-12-22 04:22:14,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:15,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:22:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:15,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:15,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:22:15,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486275850] [2020-12-22 04:22:15,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:22:15,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:15,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:22:15,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:22:15,123 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-12-22 04:22:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:15,210 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:22:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:22:15,210 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-22 04:22:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:15,211 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:22:15,211 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:22:15,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:22:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:22:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:22:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:22:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:22:15,215 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-22 04:22:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:15,216 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:22:15,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:22:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:22:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:22:15,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:15,216 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:15,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:15,430 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:15,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-12-22 04:22:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:15,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021708387] [2020-12-22 04:22:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:15,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021708387] [2020-12-22 04:22:15,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452398568] [2020-12-22 04:22:15,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:16,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:22:16,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:16,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:22:16,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:16,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:16,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:22:16,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237598318] [2020-12-22 04:22:16,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:22:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:16,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:22:16,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:16,388 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-22 04:22:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:16,487 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:22:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:22:16,488 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-22 04:22:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:16,489 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:22:16,489 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:22:16,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:22:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:22:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:22:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:22:16,493 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-22 04:22:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:16,493 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:22:16,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:22:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:22:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:22:16,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:16,494 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:16,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:22:16,708 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-12-22 04:22:16,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:16,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145683527] [2020-12-22 04:22:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:17,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145683527] [2020-12-22 04:22:17,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284452824] [2020-12-22 04:22:17,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:18,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:22:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:18,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:22:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:18,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:18,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:22:18,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613767738] [2020-12-22 04:22:18,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:22:18,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:18,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:22:18,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:22:18,889 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-22 04:22:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:18,983 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:22:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:22:18,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-22 04:22:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:18,985 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:22:18,985 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:22:18,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:22:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:22:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 04:22:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:22:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:22:18,989 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-22 04:22:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:18,991 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:22:18,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:22:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:22:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:22:18,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:18,992 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:19,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:19,206 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:19,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-12-22 04:22:19,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:19,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250219689] [2020-12-22 04:22:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:19,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250219689] [2020-12-22 04:22:19,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121967370] [2020-12-22 04:22:19,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:19,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:22:19,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:19,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:19,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:22:19,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491447364] [2020-12-22 04:22:19,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:22:19,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:19,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:22:19,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:22:19,853 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-22 04:22:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:19,968 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:22:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:22:19,969 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:22:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:19,970 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:22:19,970 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:22:19,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:22:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:22:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:22:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:22:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:22:19,973 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-22 04:22:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:19,973 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:22:19,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:22:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:22:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:22:19,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:19,974 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:20,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:22:20,186 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:20,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-12-22 04:22:20,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:20,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8139879] [2020-12-22 04:22:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:20,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8139879] [2020-12-22 04:22:20,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132423631] [2020-12-22 04:22:20,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:20,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:22:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:20,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:20,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:22:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560616552] [2020-12-22 04:22:20,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:22:20,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:20,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:22:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:22:20,866 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-22 04:22:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:20,956 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:22:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:22:20,956 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-22 04:22:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:20,957 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:22:20,957 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:22:20,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:22:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:22:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:22:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:22:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:22:20,961 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-22 04:22:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:20,961 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:22:20,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:22:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:22:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:22:20,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:20,962 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:21,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:22:21,176 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:21,176 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-12-22 04:22:21,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:21,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127698780] [2020-12-22 04:22:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:21,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127698780] [2020-12-22 04:22:21,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480690510] [2020-12-22 04:22:21,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:22,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:22:22,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:22:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:22,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:22,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:22:22,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447146980] [2020-12-22 04:22:22,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:22:22,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:22:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:22:22,507 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-22 04:22:22,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:22,613 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:22:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:22:22,613 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-22 04:22:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:22,614 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:22:22,614 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:22:22,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:22:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:22:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 04:22:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:22:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:22:22,618 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-22 04:22:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:22,618 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:22:22,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:22:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:22:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:22:22,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:22,619 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:22,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:22:22,834 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:22,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-12-22 04:22:22,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:22,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180345659] [2020-12-22 04:22:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:23,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180345659] [2020-12-22 04:22:23,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695875347] [2020-12-22 04:22:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:23,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:23,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:22:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:23,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:23,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:22:23,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961340742] [2020-12-22 04:22:23,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:22:23,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:22:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:22:23,649 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-12-22 04:22:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:23,776 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:22:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:22:23,777 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:22:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:23,777 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:22:23,778 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:22:23,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:22:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:22:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 04:22:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:22:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:22:23,781 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-22 04:22:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:23,782 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:22:23,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:22:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:22:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:22:23,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:23,783 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:23,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:22:23,999 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:23,999 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-12-22 04:22:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:24,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869355762] [2020-12-22 04:22:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:24,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869355762] [2020-12-22 04:22:24,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075161575] [2020-12-22 04:22:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:26,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:22:26,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:22:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:26,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:26,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:22:26,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163978656] [2020-12-22 04:22:26,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:22:26,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:22:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:26,135 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-22 04:22:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:26,245 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:22:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:22:26,246 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:22:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:26,247 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:22:26,247 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:22:26,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:22:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:22:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:22:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:22:26,250 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-22 04:22:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:26,251 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:22:26,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:22:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:22:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:22:26,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:26,251 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:26,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:26,465 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-12-22 04:22:26,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:26,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525965493] [2020-12-22 04:22:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:27,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525965493] [2020-12-22 04:22:27,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283674826] [2020-12-22 04:22:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:31,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:22:31,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:31,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:22:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:32,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:32,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:22:32,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64010559] [2020-12-22 04:22:32,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:22:32,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:32,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:22:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:22:32,016 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-22 04:22:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:32,144 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:22:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:22:32,145 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 04:22:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:32,146 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:22:32,146 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:22:32,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:22:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:22:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 04:22:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:22:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-22 04:22:32,150 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-22 04:22:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:32,150 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-22 04:22:32,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:22:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-22 04:22:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:22:32,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:32,151 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:32,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:32,362 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:32,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-12-22 04:22:32,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:32,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027274280] [2020-12-22 04:22:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:33,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027274280] [2020-12-22 04:22:33,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625551692] [2020-12-22 04:22:33,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:22:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:33,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:33,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:22:33,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701343984] [2020-12-22 04:22:33,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:22:33,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:33,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:22:33,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:22:33,206 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-22 04:22:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:33,350 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:22:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:22:33,350 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-22 04:22:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:33,351 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:22:33,351 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:22:33,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:22:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:22:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 04:22:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:22:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-22 04:22:33,355 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-22 04:22:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:33,355 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-22 04:22:33,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:22:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-22 04:22:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:22:33,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:33,357 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:33,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:33,571 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-12-22 04:22:33,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:33,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219796108] [2020-12-22 04:22:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:34,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219796108] [2020-12-22 04:22:34,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815021356] [2020-12-22 04:22:34,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:34,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:34,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:22:34,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:34,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:34,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:22:34,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665930651] [2020-12-22 04:22:34,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:22:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:34,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:22:34,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:22:34,583 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-22 04:22:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:34,715 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:22:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:22:34,715 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-22 04:22:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:34,716 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:22:34,716 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:22:34,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:22:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:22:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:22:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:22:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-22 04:22:34,720 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-22 04:22:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:34,720 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-22 04:22:34,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:22:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-22 04:22:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:22:34,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:34,721 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:34,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:22:34,933 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-12-22 04:22:34,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:34,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677481716] [2020-12-22 04:22:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:35,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677481716] [2020-12-22 04:22:35,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257077473] [2020-12-22 04:22:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:36,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:22:36,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:36,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:22:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:37,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:37,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:22:37,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623791124] [2020-12-22 04:22:37,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:22:37,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:37,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:22:37,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:22:37,063 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-22 04:22:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:37,195 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:22:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:22:37,196 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:22:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:37,197 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:22:37,197 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:22:37,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:22:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:22:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-22 04:22:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:22:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 04:22:37,200 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-22 04:22:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:37,201 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 04:22:37,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:22:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 04:22:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:22:37,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:37,201 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:37,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:37,415 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-12-22 04:22:37,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:37,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205314246] [2020-12-22 04:22:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:38,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205314246] [2020-12-22 04:22:38,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881392010] [2020-12-22 04:22:38,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:38,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:38,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:22:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:38,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:38,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:22:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298801221] [2020-12-22 04:22:38,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:22:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:22:38,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:22:38,479 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-12-22 04:22:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:38,592 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:22:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:22:38,593 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-22 04:22:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:38,593 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:22:38,593 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:22:38,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:22:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:22:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 04:22:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:22:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-22 04:22:38,597 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-22 04:22:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:38,597 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-22 04:22:38,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:22:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-22 04:22:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:22:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:38,598 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:38,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:22:38,813 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:38,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-12-22 04:22:38,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:38,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358192156] [2020-12-22 04:22:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:39,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358192156] [2020-12-22 04:22:39,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188118360] [2020-12-22 04:22:39,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:41,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:22:41,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:41,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:22:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:41,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:41,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:22:41,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938610907] [2020-12-22 04:22:41,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:22:41,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:41,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:22:41,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:22:41,946 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-22 04:22:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:42,121 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-22 04:22:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:22:42,122 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-22 04:22:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:42,122 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:22:42,122 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:22:42,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:22:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:22:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 04:22:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:22:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-22 04:22:42,126 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-22 04:22:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:42,126 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-22 04:22:42,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:22:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-22 04:22:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:22:42,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:42,127 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:42,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:42,327 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-12-22 04:22:42,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:42,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368576015] [2020-12-22 04:22:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:43,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368576015] [2020-12-22 04:22:43,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275871727] [2020-12-22 04:22:43,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:53,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:22:53,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:22:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:54,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:54,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:22:54,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182779107] [2020-12-22 04:22:54,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:22:54,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:22:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:22:54,030 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-12-22 04:22:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:54,192 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-22 04:22:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:22:54,193 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:22:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:54,194 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:22:54,194 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:22:54,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:22:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:22:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-22 04:22:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:22:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-22 04:22:54,198 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-22 04:22:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:54,199 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-22 04:22:54,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:22:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-22 04:22:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:22:54,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:54,200 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:54,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:22:54,416 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:54,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-12-22 04:22:54,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:54,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600300590] [2020-12-22 04:22:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:55,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600300590] [2020-12-22 04:22:55,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922697004] [2020-12-22 04:22:55,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:55,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:22:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:55,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:55,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:22:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061836179] [2020-12-22 04:22:55,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:22:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:55,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:22:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:22:55,634 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-22 04:22:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:55,796 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-22 04:22:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:22:55,797 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:22:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:55,797 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:22:55,798 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 04:22:55,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:22:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 04:22:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-22 04:22:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:22:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-22 04:22:55,801 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-22 04:22:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:55,801 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-22 04:22:55,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:22:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-22 04:22:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:22:55,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:55,802 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:56,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:22:56,017 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-12-22 04:22:56,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:56,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506804888] [2020-12-22 04:22:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506804888] [2020-12-22 04:22:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722009182] [2020-12-22 04:22:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:57,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:57,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:22:57,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:57,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:57,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:22:57,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294010901] [2020-12-22 04:22:57,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:22:57,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:22:57,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:22:57,299 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-22 04:22:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:57,476 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-22 04:22:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:22:57,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-22 04:22:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:57,477 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:22:57,477 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:22:57,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:22:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:22:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-22 04:22:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:22:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-22 04:22:57,481 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-22 04:22:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:57,481 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-22 04:22:57,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:22:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-22 04:22:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:22:57,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:57,481 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:57,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:22:57,682 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:57,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-12-22 04:22:57,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:57,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449394794] [2020-12-22 04:22:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:58,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449394794] [2020-12-22 04:22:58,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585083984] [2020-12-22 04:22:58,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:00,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:23:00,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:23:00,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:01,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:01,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:23:01,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044737750] [2020-12-22 04:23:01,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:23:01,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:23:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:23:01,083 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-22 04:23:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:01,267 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-22 04:23:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:23:01,268 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-22 04:23:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:01,268 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:23:01,269 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:23:01,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:23:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:23:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-22 04:23:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:23:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-22 04:23:01,273 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-22 04:23:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:01,273 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-22 04:23:01,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:23:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-22 04:23:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:23:01,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:01,274 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:01,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:23:01,489 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-12-22 04:23:01,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:01,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239296852] [2020-12-22 04:23:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:02,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239296852] [2020-12-22 04:23:02,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545007375] [2020-12-22 04:23:02,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:02,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:02,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:23:02,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:02,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:02,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:23:02,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770587019] [2020-12-22 04:23:02,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:23:02,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:23:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:23:02,849 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-12-22 04:23:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:03,015 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-22 04:23:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:23:03,016 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-12-22 04:23:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:03,016 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:23:03,016 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:23:03,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:23:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:23:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-22 04:23:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:23:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-22 04:23:03,020 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-22 04:23:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:03,020 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-22 04:23:03,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:23:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-22 04:23:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:23:03,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:03,021 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:03,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:03,222 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:03,223 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-12-22 04:23:03,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:03,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963993823] [2020-12-22 04:23:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:04,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963993823] [2020-12-22 04:23:04,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878598629] [2020-12-22 04:23:04,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:45,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 04:23:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:45,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:23:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:45,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:45,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:23:45,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262592561] [2020-12-22 04:23:45,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:23:45,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:23:45,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:23:45,593 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-22 04:23:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:45,785 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-22 04:23:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:23:45,786 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-22 04:23:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:45,787 INFO L225 Difference]: With dead ends: 96 [2020-12-22 04:23:45,787 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 04:23:45,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:23:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 04:23:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-22 04:23:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:23:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-22 04:23:45,793 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-22 04:23:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:45,793 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-22 04:23:45,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:23:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-22 04:23:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 04:23:45,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:45,796 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:46,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 04:23:46,009 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-12-22 04:23:46,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:46,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406598515] [2020-12-22 04:23:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:47,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406598515] [2020-12-22 04:23:47,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105604019] [2020-12-22 04:23:47,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:27,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 04:24:27,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:24:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:27,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:27,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:24:27,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035131156] [2020-12-22 04:24:27,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:24:27,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:24:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:24:27,669 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2020-12-22 04:24:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:27,863 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-22 04:24:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:24:27,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-12-22 04:24:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:27,864 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:24:27,864 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:24:27,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:24:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:24:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-22 04:24:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 04:24:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-22 04:24:27,868 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-12-22 04:24:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:27,868 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-22 04:24:27,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:24:27,869 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-22 04:24:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:24:27,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:27,869 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:28,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:28,084 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2020-12-22 04:24:28,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:28,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477950724] [2020-12-22 04:24:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477950724] [2020-12-22 04:24:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117407890] [2020-12-22 04:24:29,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:24:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:29,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:29,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:24:29,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776416669] [2020-12-22 04:24:29,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:24:29,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:29,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:24:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:24:29,608 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-12-22 04:24:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:29,769 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-22 04:24:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:24:29,769 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-22 04:24:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:29,770 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:24:29,770 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:24:29,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:24:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:24:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-22 04:24:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:24:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-22 04:24:29,776 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-12-22 04:24:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:29,776 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-22 04:24:29,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:24:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-22 04:24:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:24:29,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:29,777 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:29,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:29,991 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2020-12-22 04:24:29,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:29,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614782059] [2020-12-22 04:24:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:31,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614782059] [2020-12-22 04:24:31,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337753101] [2020-12-22 04:24:31,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:31,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:31,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:24:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:31,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:31,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:24:31,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103933419] [2020-12-22 04:24:31,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:24:31,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:24:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:24:31,618 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-12-22 04:24:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:31,817 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-22 04:24:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:24:31,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-22 04:24:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:31,819 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:24:31,819 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:24:31,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:24:31,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:24:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-22 04:24:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:24:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-22 04:24:31,823 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-12-22 04:24:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:31,823 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-22 04:24:31,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:24:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-22 04:24:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:24:31,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:31,824 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:32,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:24:32,038 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2020-12-22 04:24:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:32,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668865728] [2020-12-22 04:24:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:33,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668865728] [2020-12-22 04:24:33,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362296509] [2020-12-22 04:24:33,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:39,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 04:24:39,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:39,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:24:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:39,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:39,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:24:39,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726536582] [2020-12-22 04:24:39,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:24:39,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:24:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:24:39,729 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-12-22 04:24:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:39,922 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-22 04:24:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:24:39,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:24:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:39,923 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:24:39,924 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 04:24:39,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:24:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 04:24:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-22 04:24:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:24:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-22 04:24:39,928 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-12-22 04:24:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:39,928 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-22 04:24:39,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:24:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-22 04:24:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:24:39,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:39,929 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:40,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:24:40,142 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2020-12-22 04:24:40,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:40,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637890516] [2020-12-22 04:24:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:41,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637890516] [2020-12-22 04:24:41,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321182977] [2020-12-22 04:24:41,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:41,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:41,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:24:41,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:41,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:41,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:24:41,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376740557] [2020-12-22 04:24:41,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:24:41,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:41,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:24:41,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:24:41,951 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2020-12-22 04:24:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:42,160 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-22 04:24:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:24:42,161 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-22 04:24:42,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:42,162 INFO L225 Difference]: With dead ends: 106 [2020-12-22 04:24:42,162 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:24:42,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:24:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:24:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-22 04:24:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 04:24:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-22 04:24:42,167 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-12-22 04:24:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:42,167 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-22 04:24:42,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:24:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-22 04:24:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:24:42,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:42,168 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:42,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:24:42,384 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2020-12-22 04:24:42,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:42,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646910878] [2020-12-22 04:24:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:43,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646910878] [2020-12-22 04:24:43,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364350628] [2020-12-22 04:24:43,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:19,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 04:25:19,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:19,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:25:19,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:19,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:19,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 04:25:19,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698353656] [2020-12-22 04:25:19,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:25:19,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:25:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:25:19,263 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2020-12-22 04:25:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:19,478 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-12-22 04:25:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:25:19,481 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-12-22 04:25:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:19,482 INFO L225 Difference]: With dead ends: 108 [2020-12-22 04:25:19,482 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:25:19,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:25:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:25:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-22 04:25:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 04:25:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-12-22 04:25:19,487 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-12-22 04:25:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:19,488 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-12-22 04:25:19,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:25:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-12-22 04:25:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:25:19,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:19,489 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:19,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:19,704 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2020-12-22 04:25:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:19,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348596287] [2020-12-22 04:25:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:21,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348596287] [2020-12-22 04:25:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923917960] [2020-12-22 04:25:21,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:04,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 04:26:04,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:26:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:04,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:04,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 04:26:04,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209273528] [2020-12-22 04:26:04,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:26:04,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:26:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:26:04,478 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2020-12-22 04:26:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:04,707 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-22 04:26:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:26:04,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2020-12-22 04:26:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:04,709 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:26:04,709 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:26:04,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:26:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:26:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-22 04:26:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 04:26:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-12-22 04:26:04,713 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-12-22 04:26:04,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:04,713 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-12-22 04:26:04,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:26:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-12-22 04:26:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:26:04,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:04,714 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:04,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:26:04,929 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:04,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2020-12-22 04:26:04,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:04,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867559396] [2020-12-22 04:26:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:06,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867559396] [2020-12-22 04:26:06,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209233771] [2020-12-22 04:26:06,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:26:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:06,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:06,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 04:26:06,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447346086] [2020-12-22 04:26:06,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:26:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:26:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:26:06,946 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2020-12-22 04:26:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:07,199 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-12-22 04:26:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:26:07,199 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-12-22 04:26:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:07,200 INFO L225 Difference]: With dead ends: 112 [2020-12-22 04:26:07,200 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 04:26:07,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:26:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 04:26:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-22 04:26:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 04:26:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-22 04:26:07,205 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-12-22 04:26:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:07,205 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-22 04:26:07,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:26:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-22 04:26:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 04:26:07,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:07,206 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:07,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:26:07,422 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2020-12-22 04:26:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527101278] [2020-12-22 04:26:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:09,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527101278] [2020-12-22 04:26:09,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73009593] [2020-12-22 04:26:09,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:09,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:09,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:26:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:09,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:09,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 04:26:09,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432183203] [2020-12-22 04:26:09,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:26:09,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:09,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:26:09,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:26:09,471 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2020-12-22 04:26:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:09,741 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-12-22 04:26:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:26:09,742 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-12-22 04:26:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:09,743 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:26:09,744 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:26:09,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:26:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:26:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-22 04:26:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 04:26:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-12-22 04:26:09,748 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-12-22 04:26:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:09,749 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-12-22 04:26:09,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:26:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-12-22 04:26:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 04:26:09,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:09,751 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:09,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:09,965 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:09,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2020-12-22 04:26:09,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:09,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104621940] [2020-12-22 04:26:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104621940] [2020-12-22 04:26:11,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194367862] [2020-12-22 04:26:11,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:17,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 04:26:17,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:17,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:26:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:17,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:17,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 04:26:17,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390847622] [2020-12-22 04:26:17,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:26:17,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:26:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:26:17,355 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2020-12-22 04:26:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:17,600 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-12-22 04:26:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:26:17,601 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2020-12-22 04:26:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:17,602 INFO L225 Difference]: With dead ends: 116 [2020-12-22 04:26:17,602 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:26:17,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:26:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:26:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-22 04:26:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 04:26:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-12-22 04:26:17,606 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-12-22 04:26:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:17,606 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-12-22 04:26:17,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:26:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-12-22 04:26:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:26:17,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:17,607 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:17,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 04:26:17,821 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2020-12-22 04:26:17,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:17,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326711229] [2020-12-22 04:26:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:19,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326711229] [2020-12-22 04:26:19,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876446131] [2020-12-22 04:26:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:26:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:20,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:20,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 04:26:20,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667478744] [2020-12-22 04:26:20,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:26:20,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:26:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:26:20,110 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2020-12-22 04:26:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:20,358 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-22 04:26:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:26:20,358 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-22 04:26:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:20,360 INFO L225 Difference]: With dead ends: 118 [2020-12-22 04:26:20,360 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 04:26:20,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:26:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 04:26:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-22 04:26:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 04:26:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-12-22 04:26:20,364 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-12-22 04:26:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:20,365 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-12-22 04:26:20,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:26:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-12-22 04:26:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:26:20,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:20,366 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:20,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:20,582 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2020-12-22 04:26:20,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:20,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231112201] [2020-12-22 04:26:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:22,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231112201] [2020-12-22 04:26:22,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346094964] [2020-12-22 04:26:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true