/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/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:59:58,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:59:58,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:59:58,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:59:58,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:59:58,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:59:58,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:59:58,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:59:58,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:59:58,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:59:58,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:59:58,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:59:58,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:59:58,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:59:58,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:59:58,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:59:58,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:59:58,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:59:58,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:59:58,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:59:58,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:59:58,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:59:58,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:59:58,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:59:58,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:59:58,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:59:58,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:59:58,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:59:58,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:59:58,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:59:58,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:59:58,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:59:58,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:59:58,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:59:58,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:59:58,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:59:58,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:59:58,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:59:58,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:59:58,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:59:58,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:59:58,329 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:59:58,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:59:58,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:59:58,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:59:58,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:59:58,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:59:58,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:59:58,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:59:58,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:59:58,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:59:58,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:59:58,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:59:58,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:59:58,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:59:58,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:59:58,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:59:58,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:59:58,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:59:58,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:59:58,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:59:58,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:59:58,336 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:59:58,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:59:58,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:59:58,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:59:58,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:59:58,776 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:59:58,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/loopv3.c [2021-01-06 16:59:58,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a526104fd/f1e1e2b3fb0f4b0b9b7f50b4fcc91613/FLAGd56522864 [2021-01-06 16:59:59,509 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:59:59,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv3.c [2021-01-06 16:59:59,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a526104fd/f1e1e2b3fb0f4b0b9b7f50b4fcc91613/FLAGd56522864 [2021-01-06 16:59:59,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a526104fd/f1e1e2b3fb0f4b0b9b7f50b4fcc91613 [2021-01-06 16:59:59,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:59:59,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:59:59,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:59:59,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:59:59,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:59:59,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:59:59" (1/1) ... [2021-01-06 16:59:59,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fead894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:59, skipping insertion in model container [2021-01-06 16:59:59,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:59:59" (1/1) ... [2021-01-06 16:59:59,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:59:59,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:00:00,155 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 17:00:00,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:00:00,190 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:00:00,205 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 17:00:00,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:00:00,233 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:00:00,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00 WrapperNode [2021-01-06 17:00:00,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:00:00,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:00:00,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:00:00,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:00:00,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:00:00,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:00:00,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:00:00,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:00:00,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... [2021-01-06 17:00:00,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:00:00,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:00:00,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:00:00,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:00:00,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:00:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:00:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:00:00,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:00:00,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:00:00,628 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 17:00:00,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:00:00 BoogieIcfgContainer [2021-01-06 17:00:00,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:00:00,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:00:00,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:00:00,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:00:00,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:59:59" (1/3) ... [2021-01-06 17:00:00,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244cab9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:00:00, skipping insertion in model container [2021-01-06 17:00:00,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:00" (2/3) ... [2021-01-06 17:00:00,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244cab9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:00:00, skipping insertion in model container [2021-01-06 17:00:00,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:00:00" (3/3) ... [2021-01-06 17:00:00,639 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2021-01-06 17:00:00,647 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:00:00,652 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:00:00,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:00:00,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:00:00,704 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:00:00,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:00:00,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:00:00,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:00:00,705 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:00:00,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:00:00,706 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:00:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 17:00:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:00:00,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:00,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:00:00,732 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 17:00:00,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:00,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239486961] [2021-01-06 17:00:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239486961] [2021-01-06 17:00:01,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:00:01,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:00:01,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266309530] [2021-01-06 17:00:01,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:00:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:00:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:00:01,046 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 17:00:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:01,063 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-01-06 17:00:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:00:01,064 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 17:00:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:01,081 INFO L225 Difference]: With dead ends: 20 [2021-01-06 17:00:01,082 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 17:00:01,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:00:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 17:00:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 17:00:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 17:00:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-01-06 17:00:01,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-01-06 17:00:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:01,124 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-01-06 17:00:01,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:00:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-01-06 17:00:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:00:01,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:01,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:00:01,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:00:01,127 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-01-06 17:00:01,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:01,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833608237] [2021-01-06 17:00:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:01,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833608237] [2021-01-06 17:00:01,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:00:01,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:00:01,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192285109] [2021-01-06 17:00:01,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:00:01,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:01,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:00:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:00:01,311 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-01-06 17:00:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:01,348 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-01-06 17:00:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:00:01,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 17:00:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:01,352 INFO L225 Difference]: With dead ends: 14 [2021-01-06 17:00:01,352 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 17:00:01,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:00:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 17:00:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-01-06 17:00:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 17:00:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-01-06 17:00:01,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-01-06 17:00:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:01,359 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-01-06 17:00:01,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:00:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-01-06 17:00:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:00:01,361 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:01,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:01,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:00:01,362 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2021-01-06 17:00:01,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:01,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196791706] [2021-01-06 17:00:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:01,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196791706] [2021-01-06 17:00:01,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032682372] [2021-01-06 17:00:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:00:01,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:01,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:01,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 17:00:01,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295915257] [2021-01-06 17:00:01,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:00:01,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:01,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:00:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:00:01,698 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 7 states. [2021-01-06 17:00:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:01,745 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-01-06 17:00:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:00:01,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2021-01-06 17:00:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:01,747 INFO L225 Difference]: With dead ends: 16 [2021-01-06 17:00:01,747 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 17:00:01,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:00:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 17:00:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 17:00:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 17:00:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-01-06 17:00:01,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-01-06 17:00:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:01,752 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-01-06 17:00:01,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:00:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-01-06 17:00:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:00:01,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:01,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:01,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 17:00:01,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-01-06 17:00:01,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:01,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238795483] [2021-01-06 17:00:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238795483] [2021-01-06 17:00:02,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051584150] [2021-01-06 17:00:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:00:02,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:02,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 17:00:02,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868138372] [2021-01-06 17:00:02,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:00:02,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:02,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:00:02,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:00:02,134 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 7 states. [2021-01-06 17:00:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:02,165 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-01-06 17:00:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:00:02,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2021-01-06 17:00:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:02,167 INFO L225 Difference]: With dead ends: 17 [2021-01-06 17:00:02,167 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 17:00:02,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:00:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 17:00:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2021-01-06 17:00:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 17:00:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-01-06 17:00:02,171 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-01-06 17:00:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:02,172 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-01-06 17:00:02,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:00:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-01-06 17:00:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:00:02,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:02,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:02,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:02,387 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1775672709, now seen corresponding path program 2 times [2021-01-06 17:00:02,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:02,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175890272] [2021-01-06 17:00:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175890272] [2021-01-06 17:00:02,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997354187] [2021-01-06 17:00:02,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:02,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:00:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:02,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 17:00:02,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052393750] [2021-01-06 17:00:02,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:00:02,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:00:02,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:02,553 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 9 states. [2021-01-06 17:00:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:02,592 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-01-06 17:00:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:00:02,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2021-01-06 17:00:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:02,593 INFO L225 Difference]: With dead ends: 19 [2021-01-06 17:00:02,593 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:00:02,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:00:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-01-06 17:00:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 17:00:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 17:00:02,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2021-01-06 17:00:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:02,598 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 17:00:02,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:00:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 17:00:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:00:02,599 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:02,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:02,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:02,813 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:02,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1777519751, now seen corresponding path program 1 times [2021-01-06 17:00:02,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:02,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953921885] [2021-01-06 17:00:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953921885] [2021-01-06 17:00:02,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166263664] [2021-01-06 17:00:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:00:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:02,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:02,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 17:00:02,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558657267] [2021-01-06 17:00:02,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:00:02,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:00:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:02,961 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 9 states. [2021-01-06 17:00:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:02,991 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-01-06 17:00:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:00:02,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2021-01-06 17:00:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:02,992 INFO L225 Difference]: With dead ends: 19 [2021-01-06 17:00:02,992 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:00:02,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:00:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-01-06 17:00:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 17:00:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 17:00:02,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2021-01-06 17:00:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:02,997 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 17:00:02,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:00:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 17:00:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:00:02,998 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:02,998 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:03,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:03,212 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash 744287225, now seen corresponding path program 2 times [2021-01-06 17:00:03,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:03,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928290123] [2021-01-06 17:00:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:03,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928290123] [2021-01-06 17:00:03,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604932733] [2021-01-06 17:00:03,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:03,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:03,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:03,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:00:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:03,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:03,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 17:00:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608156585] [2021-01-06 17:00:03,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:00:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:03,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:00:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:03,410 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 9 states. [2021-01-06 17:00:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:03,443 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-01-06 17:00:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:00:03,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2021-01-06 17:00:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:03,444 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:00:03,445 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:00:03,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:00:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-01-06 17:00:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:00:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-01-06 17:00:03,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2021-01-06 17:00:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:03,449 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-01-06 17:00:03,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:00:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-01-06 17:00:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:00:03,450 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:03,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:03,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:00:03,666 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:03,667 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-01-06 17:00:03,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:03,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092047607] [2021-01-06 17:00:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:03,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092047607] [2021-01-06 17:00:03,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807963518] [2021-01-06 17:00:03,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:03,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:03,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:00:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:03,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:03,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 17:00:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284532100] [2021-01-06 17:00:03,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:00:03,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:03,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:00:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:03,809 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 9 states. [2021-01-06 17:00:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:03,845 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-01-06 17:00:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:00:03,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2021-01-06 17:00:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:03,847 INFO L225 Difference]: With dead ends: 21 [2021-01-06 17:00:03,847 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:00:03,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:00:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2021-01-06 17:00:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 17:00:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 17:00:03,851 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2021-01-06 17:00:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:03,851 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 17:00:03,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:00:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 17:00:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:03,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:03,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:04,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:04,067 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:04,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1267267040, now seen corresponding path program 3 times [2021-01-06 17:00:04,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:04,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522541858] [2021-01-06 17:00:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:04,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522541858] [2021-01-06 17:00:04,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412431193] [2021-01-06 17:00:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:04,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:00:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:04,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:04,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:00:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81966] [2021-01-06 17:00:04,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:00:04,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:00:04,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:04,239 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 11 states. [2021-01-06 17:00:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:04,289 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-01-06 17:00:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:00:04,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 17:00:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:04,290 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:00:04,290 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:00:04,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:00:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 17:00:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:00:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 17:00:04,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-01-06 17:00:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:04,295 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 17:00:04,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:00:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 17:00:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:04,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:04,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:04,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:04,512 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:04,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1269114082, now seen corresponding path program 3 times [2021-01-06 17:00:04,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:04,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268400169] [2021-01-06 17:00:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:04,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268400169] [2021-01-06 17:00:04,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182178749] [2021-01-06 17:00:04,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:04,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:00:04,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:04,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:04,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:04,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:04,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:00:04,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483304059] [2021-01-06 17:00:04,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:00:04,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:04,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:00:04,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:04,721 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 11 states. [2021-01-06 17:00:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:04,790 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-01-06 17:00:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:00:04,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 17:00:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:04,791 INFO L225 Difference]: With dead ends: 23 [2021-01-06 17:00:04,792 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:00:04,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:00:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-01-06 17:00:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:00:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-01-06 17:00:04,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2021-01-06 17:00:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:04,797 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-01-06 17:00:04,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:00:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-01-06 17:00:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:04,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:04,798 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:05,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:00:05,011 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1252692894, now seen corresponding path program 4 times [2021-01-06 17:00:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:05,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573931474] [2021-01-06 17:00:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:05,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573931474] [2021-01-06 17:00:05,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320314468] [2021-01-06 17:00:05,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:05,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:05,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:05,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:00:05,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:05,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:05,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-01-06 17:00:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134204019] [2021-01-06 17:00:05,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:00:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:05,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:00:05,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:00:05,235 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 12 states. [2021-01-06 17:00:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:05,427 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-01-06 17:00:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:05,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2021-01-06 17:00:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:05,428 INFO L225 Difference]: With dead ends: 25 [2021-01-06 17:00:05,428 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:00:05,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:00:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-01-06 17:00:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:00:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 17:00:05,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-01-06 17:00:05,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:05,433 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 17:00:05,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:00:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 17:00:05,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:05,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:05,434 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:05,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:05,658 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:05,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1250845852, now seen corresponding path program 5 times [2021-01-06 17:00:05,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:05,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674527698] [2021-01-06 17:00:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:05,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674527698] [2021-01-06 17:00:05,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270600564] [2021-01-06 17:00:05,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:05,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:00:05,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:05,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:05,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:05,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:00:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742295783] [2021-01-06 17:00:05,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:00:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:00:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:05,880 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 11 states. [2021-01-06 17:00:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:05,929 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-01-06 17:00:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:00:05,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 17:00:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:05,930 INFO L225 Difference]: With dead ends: 23 [2021-01-06 17:00:05,930 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:00:05,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:00:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-01-06 17:00:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:00:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-01-06 17:00:05,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2021-01-06 17:00:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:05,935 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-01-06 17:00:05,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:00:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-01-06 17:00:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:05,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:05,936 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:06,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:06,150 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1947325410, now seen corresponding path program 6 times [2021-01-06 17:00:06,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:06,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313077668] [2021-01-06 17:00:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:06,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313077668] [2021-01-06 17:00:06,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060398552] [2021-01-06 17:00:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:06,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:00:06,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:06,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:06,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:00:06,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029284601] [2021-01-06 17:00:06,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:00:06,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:06,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:00:06,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:06,328 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 11 states. [2021-01-06 17:00:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:06,367 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-01-06 17:00:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:00:06,368 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 17:00:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:06,368 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:00:06,369 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:00:06,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:00:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-01-06 17:00:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:06,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2021-01-06 17:00:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:06,375 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:06,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:00:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:06,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:06,376 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:06,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:00:06,590 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1949172452, now seen corresponding path program 7 times [2021-01-06 17:00:06,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:06,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602279367] [2021-01-06 17:00:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602279367] [2021-01-06 17:00:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765359781] [2021-01-06 17:00:06,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:06,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:06,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:06,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:00:06,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286929194] [2021-01-06 17:00:06,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:00:06,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:06,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:00:06,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:06,799 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 11 states. [2021-01-06 17:00:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:06,852 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-01-06 17:00:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:00:06,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 17:00:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:06,853 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:00:06,853 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:00:06,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:06,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:00:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2021-01-06 17:00:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:00:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 17:00:06,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-01-06 17:00:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:06,859 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 17:00:06,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:00:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 17:00:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:06,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:06,860 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:07,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:00:07,066 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 8 times [2021-01-06 17:00:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:07,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6038233] [2021-01-06 17:00:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:07,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6038233] [2021-01-06 17:00:07,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112532932] [2021-01-06 17:00:07,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:07,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:07,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:07,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:07,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:00:07,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046030239] [2021-01-06 17:00:07,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:00:07,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:00:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:07,242 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 11 states. [2021-01-06 17:00:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:07,288 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-01-06 17:00:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:00:07,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 17:00:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:07,290 INFO L225 Difference]: With dead ends: 26 [2021-01-06 17:00:07,290 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:00:07,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:00:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-01-06 17:00:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:07,295 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2021-01-06 17:00:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:07,295 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:07,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:00:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:07,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:07,296 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:07,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:00:07,510 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:07,511 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2021-01-06 17:00:07,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:07,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060033718] [2021-01-06 17:00:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:07,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060033718] [2021-01-06 17:00:07,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908536291] [2021-01-06 17:00:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:00:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:07,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:07,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:00:07,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766495096] [2021-01-06 17:00:07,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:00:07,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:00:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:07,714 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 11 states. [2021-01-06 17:00:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:07,763 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-01-06 17:00:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:00:07,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 17:00:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:07,767 INFO L225 Difference]: With dead ends: 25 [2021-01-06 17:00:07,767 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:00:07,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:00:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:00:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2021-01-06 17:00:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:00:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-01-06 17:00:07,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2021-01-06 17:00:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:07,776 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-01-06 17:00:07,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:00:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-01-06 17:00:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:07,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:07,777 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:07,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:07,992 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1979276421, now seen corresponding path program 4 times [2021-01-06 17:00:07,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:07,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551401332] [2021-01-06 17:00:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:08,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551401332] [2021-01-06 17:00:08,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849365180] [2021-01-06 17:00:08,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:08,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:08,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:08,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:00:08,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:08,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:08,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-01-06 17:00:08,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432458618] [2021-01-06 17:00:08,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:00:08,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:08,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:00:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:00:08,166 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 14 states. [2021-01-06 17:00:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:08,332 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-01-06 17:00:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:08,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2021-01-06 17:00:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:08,333 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:00:08,333 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:00:08,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:00:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-01-06 17:00:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:08,339 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 14 [2021-01-06 17:00:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:08,339 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:08,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:00:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:08,340 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:08,340 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:08,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:00:08,554 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:08,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1977429379, now seen corresponding path program 9 times [2021-01-06 17:00:08,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:08,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639927269] [2021-01-06 17:00:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:08,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639927269] [2021-01-06 17:00:08,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690552197] [2021-01-06 17:00:08,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:08,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 17:00:08,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:08,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:08,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:08,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:08,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962170649] [2021-01-06 17:00:08,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:08,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:08,745 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 13 states. [2021-01-06 17:00:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:08,803 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-01-06 17:00:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:08,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:08,804 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:00:08,804 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:00:08,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:00:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-01-06 17:00:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:08,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2021-01-06 17:00:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:08,810 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:08,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:08,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:08,811 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:09,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:00:09,026 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:09,027 INFO L82 PathProgramCache]: Analyzing trace with hash 204269059, now seen corresponding path program 10 times [2021-01-06 17:00:09,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:09,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476579665] [2021-01-06 17:00:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476579665] [2021-01-06 17:00:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146951972] [2021-01-06 17:00:09,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:09,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:09,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:09,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:00:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:09,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:09,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-01-06 17:00:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546447975] [2021-01-06 17:00:09,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:00:09,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:00:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:00:09,204 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 14 states. [2021-01-06 17:00:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:09,412 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-01-06 17:00:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:09,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2021-01-06 17:00:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:09,413 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:00:09,413 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:00:09,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:00:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:00:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-01-06 17:00:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:09,421 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 14 [2021-01-06 17:00:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:09,421 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:09,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:00:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:09,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:09,422 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:09,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:09,638 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:09,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:09,638 INFO L82 PathProgramCache]: Analyzing trace with hash 202422017, now seen corresponding path program 11 times [2021-01-06 17:00:09,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:09,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434693881] [2021-01-06 17:00:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:09,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434693881] [2021-01-06 17:00:09,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801381506] [2021-01-06 17:00:09,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:09,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 17:00:09,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:09,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:09,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:09,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:09,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118668439] [2021-01-06 17:00:09,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:09,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:09,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:09,828 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 13 states. [2021-01-06 17:00:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:09,883 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-01-06 17:00:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:09,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:09,884 INFO L225 Difference]: With dead ends: 27 [2021-01-06 17:00:09,884 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:00:09,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:00:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-01-06 17:00:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:00:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 17:00:09,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2021-01-06 17:00:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:09,890 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 17:00:09,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 17:00:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:09,890 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:09,890 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:10,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:10,106 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:10,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1299218051, now seen corresponding path program 12 times [2021-01-06 17:00:10,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:10,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584108717] [2021-01-06 17:00:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:10,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584108717] [2021-01-06 17:00:10,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321561348] [2021-01-06 17:00:10,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:10,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 17:00:10,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:10,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:10,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900618995] [2021-01-06 17:00:10,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:10,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:10,291 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 13 states. [2021-01-06 17:00:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:10,346 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-01-06 17:00:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:10,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:10,347 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:00:10,347 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:00:10,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:00:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-01-06 17:00:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:10,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 14 [2021-01-06 17:00:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:10,354 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:10,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:10,354 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:10,354 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:10,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:10,570 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:10,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1297371009, now seen corresponding path program 13 times [2021-01-06 17:00:10,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:10,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929053761] [2021-01-06 17:00:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:10,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929053761] [2021-01-06 17:00:10,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741814452] [2021-01-06 17:00:10,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:10,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:10,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:10,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:10,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:10,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788007525] [2021-01-06 17:00:10,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:10,762 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 13 states. [2021-01-06 17:00:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:10,820 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-01-06 17:00:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:10,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:10,821 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:00:10,821 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:00:10,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:00:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-01-06 17:00:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:10,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2021-01-06 17:00:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:10,828 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:10,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:10,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:10,831 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:11,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:00:11,046 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash -475789311, now seen corresponding path program 14 times [2021-01-06 17:00:11,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:11,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381207848] [2021-01-06 17:00:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381207848] [2021-01-06 17:00:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838716129] [2021-01-06 17:00:11,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:11,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:11,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:11,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:11,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:11,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:11,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:11,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560075653] [2021-01-06 17:00:11,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:11,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:11,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:11,216 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 13 states. [2021-01-06 17:00:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:11,272 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-01-06 17:00:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:11,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:11,273 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:00:11,273 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:00:11,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:00:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-01-06 17:00:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:11,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 14 [2021-01-06 17:00:11,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:11,278 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:11,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:11,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:11,279 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:11,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 17:00:11,494 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash -477636353, now seen corresponding path program 15 times [2021-01-06 17:00:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:11,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869006855] [2021-01-06 17:00:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:11,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869006855] [2021-01-06 17:00:11,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704583061] [2021-01-06 17:00:11,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:11,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 17:00:11,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:11,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:11,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:11,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:11,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924160753] [2021-01-06 17:00:11,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:11,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:11,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:11,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:11,698 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 13 states. [2021-01-06 17:00:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:11,748 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-01-06 17:00:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:11,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:11,750 INFO L225 Difference]: With dead ends: 27 [2021-01-06 17:00:11,750 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:00:11,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:00:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-01-06 17:00:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:00:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 17:00:11,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2021-01-06 17:00:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:11,761 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 17:00:11,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 17:00:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:11,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:11,763 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:11,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:11,978 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:11,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1278211843, now seen corresponding path program 16 times [2021-01-06 17:00:11,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:11,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329498398] [2021-01-06 17:00:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:12,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329498398] [2021-01-06 17:00:12,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273869515] [2021-01-06 17:00:12,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:12,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:12,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:12,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:00:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:12,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:12,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-01-06 17:00:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380037891] [2021-01-06 17:00:12,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:00:12,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:00:12,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:00:12,147 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 14 states. [2021-01-06 17:00:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:12,400 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:00:12,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2021-01-06 17:00:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:12,401 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:12,401 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:12,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2021-01-06 17:00:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:12,408 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2021-01-06 17:00:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:12,408 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:12,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:00:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:12,409 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:12,409 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:12,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:00:12,624 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1276364801, now seen corresponding path program 17 times [2021-01-06 17:00:12,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:12,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144165511] [2021-01-06 17:00:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:12,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144165511] [2021-01-06 17:00:12,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047690401] [2021-01-06 17:00:12,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:12,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 17:00:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:12,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:12,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:12,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385301356] [2021-01-06 17:00:12,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:12,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:12,826 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 13 states. [2021-01-06 17:00:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:12,884 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-01-06 17:00:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:12,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:12,885 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:00:12,885 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:00:12,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:00:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2021-01-06 17:00:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:12,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 14 [2021-01-06 17:00:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:12,891 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:12,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:12,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:12,892 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:13,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:13,106 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash -496795519, now seen corresponding path program 18 times [2021-01-06 17:00:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:13,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928393761] [2021-01-06 17:00:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928393761] [2021-01-06 17:00:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205261313] [2021-01-06 17:00:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:13,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 17:00:13,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:13,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:13,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:13,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829657453] [2021-01-06 17:00:13,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:13,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:13,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:13,268 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 13 states. [2021-01-06 17:00:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:13,334 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:13,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:13,336 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:13,336 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:13,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-01-06 17:00:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:13,342 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2021-01-06 17:00:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:13,342 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:13,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:13,342 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:13,343 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:13,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:00:13,558 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:13,558 INFO L82 PathProgramCache]: Analyzing trace with hash -498642561, now seen corresponding path program 19 times [2021-01-06 17:00:13,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:13,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488502139] [2021-01-06 17:00:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:13,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488502139] [2021-01-06 17:00:13,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954466382] [2021-01-06 17:00:13,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:13,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:13,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:13,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:13,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058553377] [2021-01-06 17:00:13,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:13,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:13,721 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 13 states. [2021-01-06 17:00:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:13,778 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-01-06 17:00:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:13,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:13,779 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:00:13,779 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:00:13,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:00:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2021-01-06 17:00:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:13,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2021-01-06 17:00:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:13,784 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:13,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:13,785 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:13,785 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:13,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:00:13,999 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:13,999 INFO L82 PathProgramCache]: Analyzing trace with hash 598153473, now seen corresponding path program 20 times [2021-01-06 17:00:14,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:14,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210722253] [2021-01-06 17:00:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:14,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210722253] [2021-01-06 17:00:14,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121694504] [2021-01-06 17:00:14,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:14,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:14,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:14,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:14,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:14,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982493234] [2021-01-06 17:00:14,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:14,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:14,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:14,179 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 13 states. [2021-01-06 17:00:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:14,236 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-01-06 17:00:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:14,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:14,237 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:00:14,237 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:00:14,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:00:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-01-06 17:00:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:14,243 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2021-01-06 17:00:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:14,243 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:14,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:14,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:14,244 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:14,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:00:14,457 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:14,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:14,458 INFO L82 PathProgramCache]: Analyzing trace with hash 596306431, now seen corresponding path program 21 times [2021-01-06 17:00:14,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:14,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577761292] [2021-01-06 17:00:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:14,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577761292] [2021-01-06 17:00:14,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459316537] [2021-01-06 17:00:14,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:14,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 17:00:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:14,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:14,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:14,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 17:00:14,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888649057] [2021-01-06 17:00:14,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:14,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:14,651 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 13 states. [2021-01-06 17:00:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:14,711 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-01-06 17:00:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:14,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:00:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:14,712 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:00:14,712 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:00:14,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:00:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-01-06 17:00:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:14,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 14 [2021-01-06 17:00:14,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:14,718 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:14,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:14,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:14,719 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:14,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:14,933 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 22 times [2021-01-06 17:00:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:14,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314979423] [2021-01-06 17:00:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:14,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314979423] [2021-01-06 17:00:14,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740725033] [2021-01-06 17:00:14,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:15,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:15,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:15,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:00:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:15,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:15,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-01-06 17:00:15,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134406000] [2021-01-06 17:00:15,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:00:15,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:15,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:00:15,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:00:15,099 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 14 states. [2021-01-06 17:00:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:15,389 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2021-01-06 17:00:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:00:15,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2021-01-06 17:00:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:15,390 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:00:15,390 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:00:15,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:00:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 17:00:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:15,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2021-01-06 17:00:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:15,396 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:15,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:00:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:15,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:15,397 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:15,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 17:00:15,611 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1178700931, now seen corresponding path program 4 times [2021-01-06 17:00:15,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:15,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160188739] [2021-01-06 17:00:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160188739] [2021-01-06 17:00:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132333926] [2021-01-06 17:00:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:15,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:15,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:15,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:00:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:15,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:15,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-01-06 17:00:15,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580823812] [2021-01-06 17:00:15,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:00:15,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:15,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:00:15,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:00:15,779 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 14 states. [2021-01-06 17:00:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:16,071 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-01-06 17:00:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:00:16,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2021-01-06 17:00:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:16,072 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:00:16,072 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:00:16,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:00:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-01-06 17:00:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:00:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 17:00:16,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2021-01-06 17:00:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:16,077 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 17:00:16,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:00:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 17:00:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:16,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:16,077 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:16,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:16,291 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash -533681750, now seen corresponding path program 5 times [2021-01-06 17:00:16,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:16,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415358118] [2021-01-06 17:00:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:16,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415358118] [2021-01-06 17:00:16,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137208682] [2021-01-06 17:00:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:16,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:00:16,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:16,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:16,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970011000] [2021-01-06 17:00:16,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:16,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:16,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:16,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:16,519 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 15 states. [2021-01-06 17:00:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:16,591 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:16,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:16,592 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:16,592 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:16,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-01-06 17:00:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:16,606 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:16,606 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:16,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:16,607 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:16,607 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:16,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 17:00:16,808 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash -535528792, now seen corresponding path program 23 times [2021-01-06 17:00:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:16,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393919125] [2021-01-06 17:00:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:16,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393919125] [2021-01-06 17:00:16,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088279793] [2021-01-06 17:00:16,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:16,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:00:16,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:16,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:17,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:17,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:17,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988270938] [2021-01-06 17:00:17,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:17,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:17,007 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:17,076 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:17,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:17,077 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:17,077 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:17,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-01-06 17:00:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:17,084 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-01-06 17:00:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:17,084 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:17,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:17,084 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:17,084 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:17,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 17:00:17,298 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:17,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1986278184, now seen corresponding path program 24 times [2021-01-06 17:00:17,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:17,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238254796] [2021-01-06 17:00:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:17,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238254796] [2021-01-06 17:00:17,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484951411] [2021-01-06 17:00:17,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:17,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 17:00:17,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:17,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:17,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:17,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:17,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890326755] [2021-01-06 17:00:17,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:17,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:17,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:17,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:17,516 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 15 states. [2021-01-06 17:00:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:17,591 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:17,592 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:17,592 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:17,592 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:17,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-01-06 17:00:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:17,599 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:17,599 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:17,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:17,600 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:17,600 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:17,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:00:17,815 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:17,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1984431142, now seen corresponding path program 25 times [2021-01-06 17:00:17,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:17,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237043982] [2021-01-06 17:00:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237043982] [2021-01-06 17:00:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695383160] [2021-01-06 17:00:17,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:17,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:17,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:17,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:17,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106424827] [2021-01-06 17:00:17,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:17,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:17,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:18,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:18,000 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:18,079 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:18,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:18,080 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:18,081 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:18,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2021-01-06 17:00:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:18,086 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 16 [2021-01-06 17:00:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:18,086 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:18,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:18,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:18,087 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:18,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 17:00:18,288 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1213740120, now seen corresponding path program 26 times [2021-01-06 17:00:18,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:18,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015936845] [2021-01-06 17:00:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015936845] [2021-01-06 17:00:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936733671] [2021-01-06 17:00:18,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:18,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:18,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:18,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:18,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:18,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:18,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883373794] [2021-01-06 17:00:18,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:18,497 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 15 states. [2021-01-06 17:00:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:18,573 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-01-06 17:00:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:18,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:18,574 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:00:18,574 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:00:18,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:00:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-01-06 17:00:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:18,582 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:18,582 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:18,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:18,583 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:18,583 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:18,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:00:18,798 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1215587162, now seen corresponding path program 27 times [2021-01-06 17:00:18,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:18,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500683316] [2021-01-06 17:00:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500683316] [2021-01-06 17:00:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568497294] [2021-01-06 17:00:18,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:18,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:00:18,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:19,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:19,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:19,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589257792] [2021-01-06 17:00:19,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:19,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:19,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:19,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:19,015 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:19,083 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-01-06 17:00:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:19,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:19,084 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:00:19,084 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:00:19,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:00:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-01-06 17:00:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:19,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-01-06 17:00:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:19,091 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:19,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:19,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:19,092 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:19,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:00:19,306 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1306219814, now seen corresponding path program 28 times [2021-01-06 17:00:19,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:19,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188089674] [2021-01-06 17:00:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:19,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188089674] [2021-01-06 17:00:19,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106802130] [2021-01-06 17:00:19,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:19,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:19,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:19,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:00:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:19,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:19,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-01-06 17:00:19,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525230897] [2021-01-06 17:00:19,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:00:19,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:00:19,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:19,503 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 16 states. [2021-01-06 17:00:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:19,874 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:00:19,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2021-01-06 17:00:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:19,875 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:19,875 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:19,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:00:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-01-06 17:00:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:19,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:19,884 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:19,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:00:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:19,884 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:19,884 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:20,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:00:20,090 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:20,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1304372772, now seen corresponding path program 29 times [2021-01-06 17:00:20,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:20,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804472402] [2021-01-06 17:00:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:20,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804472402] [2021-01-06 17:00:20,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626719086] [2021-01-06 17:00:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:20,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:00:20,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:20,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:20,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:20,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:20,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412273851] [2021-01-06 17:00:20,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:20,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:20,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:20,289 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:20,360 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2021-01-06 17:00:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:20,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:20,361 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:00:20,361 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:00:20,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:00:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-01-06 17:00:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:20,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 16 [2021-01-06 17:00:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:20,369 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:20,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:20,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:20,370 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:20,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:00:20,584 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1234746328, now seen corresponding path program 30 times [2021-01-06 17:00:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187248683] [2021-01-06 17:00:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:20,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187248683] [2021-01-06 17:00:20,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996478670] [2021-01-06 17:00:20,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:20,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 17:00:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:20,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:20,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:20,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056122984] [2021-01-06 17:00:20,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:20,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:20,816 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 15 states. [2021-01-06 17:00:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:20,890 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:20,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:20,891 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:20,891 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:20,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-01-06 17:00:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:20,899 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:20,899 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:20,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:20,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:20,899 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:21,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:21,100 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1236593370, now seen corresponding path program 31 times [2021-01-06 17:00:21,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:21,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18074410] [2021-01-06 17:00:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:21,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18074410] [2021-01-06 17:00:21,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501016720] [2021-01-06 17:00:21,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:21,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:21,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:21,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:21,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:21,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592847543] [2021-01-06 17:00:21,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:21,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:21,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:21,299 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:21,382 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:21,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:21,383 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:21,383 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:21,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-01-06 17:00:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:21,389 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-01-06 17:00:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:21,389 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:21,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:21,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:21,390 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:21,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:21,592 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1285213606, now seen corresponding path program 32 times [2021-01-06 17:00:21,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:21,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307627962] [2021-01-06 17:00:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:21,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307627962] [2021-01-06 17:00:21,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798675179] [2021-01-06 17:00:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:21,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:21,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:21,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:21,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:21,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:21,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:21,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989881185] [2021-01-06 17:00:21,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:21,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:21,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:21,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:21,799 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 15 states. [2021-01-06 17:00:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:21,877 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:21,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:21,879 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:21,879 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:21,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-01-06 17:00:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:21,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:21,889 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:21,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:21,890 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:21,890 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:22,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 17:00:22,103 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:22,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1283366564, now seen corresponding path program 33 times [2021-01-06 17:00:22,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:22,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497235975] [2021-01-06 17:00:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:22,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497235975] [2021-01-06 17:00:22,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923420763] [2021-01-06 17:00:22,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:22,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:00:22,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:22,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:22,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:22,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:22,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:22,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265979618] [2021-01-06 17:00:22,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:22,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:22,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:22,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:22,295 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:22,366 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:22,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:22,368 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:22,368 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:22,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2021-01-06 17:00:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:22,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 16 [2021-01-06 17:00:22,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:22,374 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:22,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:22,374 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:22,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:22,375 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:22,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:22,584 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1914804698, now seen corresponding path program 34 times [2021-01-06 17:00:22,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:22,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449834545] [2021-01-06 17:00:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449834545] [2021-01-06 17:00:22,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437485325] [2021-01-06 17:00:22,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:22,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:22,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:22,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:00:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:22,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:22,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-01-06 17:00:22,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359920631] [2021-01-06 17:00:22,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:00:22,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:22,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:00:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:22,788 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 16 states. [2021-01-06 17:00:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:23,147 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:00:23,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2021-01-06 17:00:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:23,148 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:23,148 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:23,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:00:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-01-06 17:00:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:23,157 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:23,157 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:23,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:00:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:23,158 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:23,158 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:23,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:23,372 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1916651740, now seen corresponding path program 35 times [2021-01-06 17:00:23,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:23,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173190699] [2021-01-06 17:00:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:23,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173190699] [2021-01-06 17:00:23,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168812767] [2021-01-06 17:00:23,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:23,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:00:23,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:23,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:23,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:23,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436698414] [2021-01-06 17:00:23,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:23,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:23,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:23,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:23,555 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:23,617 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-01-06 17:00:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:23,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:23,618 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:00:23,619 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:00:23,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:00:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-01-06 17:00:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:23,625 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-01-06 17:00:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:23,626 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:23,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:23,626 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:23,626 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:23,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 17:00:23,827 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash 605155236, now seen corresponding path program 36 times [2021-01-06 17:00:23,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:23,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326820423] [2021-01-06 17:00:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:23,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326820423] [2021-01-06 17:00:23,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285798779] [2021-01-06 17:00:23,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:23,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 17:00:23,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:23,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:24,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:24,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780227621] [2021-01-06 17:00:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:24,025 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 15 states. [2021-01-06 17:00:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:24,097 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-01-06 17:00:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:24,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:24,098 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:00:24,098 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:00:24,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:00:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:00:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:24,107 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:24,107 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:24,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:24,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:24,108 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:24,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 17:00:24,309 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:24,309 INFO L82 PathProgramCache]: Analyzing trace with hash 603308194, now seen corresponding path program 37 times [2021-01-06 17:00:24,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:24,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298012003] [2021-01-06 17:00:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:24,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298012003] [2021-01-06 17:00:24,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726120270] [2021-01-06 17:00:24,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:24,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:24,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:24,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610755557] [2021-01-06 17:00:24,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:24,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:24,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:24,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:24,497 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:24,568 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2021-01-06 17:00:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:24,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:24,569 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:00:24,569 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:00:24,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:00:24,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-01-06 17:00:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:24,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 16 [2021-01-06 17:00:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:24,576 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:24,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:24,576 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:24,576 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:24,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 17:00:24,777 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:24,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 53124264, now seen corresponding path program 38 times [2021-01-06 17:00:24,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:24,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307760832] [2021-01-06 17:00:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:24,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307760832] [2021-01-06 17:00:24,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489293828] [2021-01-06 17:00:24,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:24,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:24,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:24,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:24,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:24,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639275757] [2021-01-06 17:00:24,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:24,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:24,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:24,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:24,990 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 15 states. [2021-01-06 17:00:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:25,070 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:00:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:25,070 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:25,071 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:25,071 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:25,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-01-06 17:00:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:25,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:25,079 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:25,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:25,079 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:25,079 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:25,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:25,280 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:25,281 INFO L82 PathProgramCache]: Analyzing trace with hash 51277222, now seen corresponding path program 39 times [2021-01-06 17:00:25,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:25,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556534523] [2021-01-06 17:00:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:25,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556534523] [2021-01-06 17:00:25,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241319179] [2021-01-06 17:00:25,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:25,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:00:25,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:25,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:25,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:25,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:25,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322549006] [2021-01-06 17:00:25,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:25,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:25,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:25,477 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:25,550 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:00:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:25,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:25,552 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:25,552 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:25,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-01-06 17:00:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:25,562 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:25,562 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:25,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:25,563 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:25,563 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:25,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 17:00:25,777 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:25,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1721883098, now seen corresponding path program 40 times [2021-01-06 17:00:25,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:25,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299218329] [2021-01-06 17:00:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299218329] [2021-01-06 17:00:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141301404] [2021-01-06 17:00:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:25,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:25,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:25,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:00:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:25,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:25,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-01-06 17:00:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853620788] [2021-01-06 17:00:25,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:00:25,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:00:25,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:25,963 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 16 states. [2021-01-06 17:00:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:26,362 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:00:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:00:26,363 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2021-01-06 17:00:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:26,364 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:00:26,364 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:00:26,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:00:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:00:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2021-01-06 17:00:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:26,375 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:26,375 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:26,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:00:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:26,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:26,376 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:26,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:26,584 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1723730140, now seen corresponding path program 41 times [2021-01-06 17:00:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:26,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344422302] [2021-01-06 17:00:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:26,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344422302] [2021-01-06 17:00:26,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489945846] [2021-01-06 17:00:26,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:26,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:00:26,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:26,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:26,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:26,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:26,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413373059] [2021-01-06 17:00:26,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:26,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:26,794 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:26,874 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:26,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:26,876 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:26,876 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:26,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2021-01-06 17:00:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:26,882 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-01-06 17:00:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:26,883 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:26,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:26,883 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:26,883 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:27,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:27,084 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -626934106, now seen corresponding path program 42 times [2021-01-06 17:00:27,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:27,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875770516] [2021-01-06 17:00:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:27,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875770516] [2021-01-06 17:00:27,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498707115] [2021-01-06 17:00:27,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:27,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 17:00:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:27,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:27,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:27,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:27,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653275047] [2021-01-06 17:00:27,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:27,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:27,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:27,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:27,284 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 15 states. [2021-01-06 17:00:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:27,352 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:00:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:27,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:27,353 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:27,354 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:27,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-01-06 17:00:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:27,364 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:27,364 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:27,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:27,365 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:27,365 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:27,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 17:00:27,580 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash -628781148, now seen corresponding path program 43 times [2021-01-06 17:00:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:27,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869136337] [2021-01-06 17:00:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:27,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869136337] [2021-01-06 17:00:27,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118118051] [2021-01-06 17:00:27,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:27,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:27,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:27,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:27,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646274532] [2021-01-06 17:00:27,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:27,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:27,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:27,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:27,790 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:27,868 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:00:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:27,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:27,870 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:27,870 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:27,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-01-06 17:00:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:27,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:27,877 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:27,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:27,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:27,877 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:28,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:28,078 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:28,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1893025828, now seen corresponding path program 44 times [2021-01-06 17:00:28,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:28,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386497664] [2021-01-06 17:00:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:28,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386497664] [2021-01-06 17:00:28,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233308893] [2021-01-06 17:00:28,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:00:28,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:28,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:28,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:28,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301888064] [2021-01-06 17:00:28,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:28,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:28,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:28,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:28,259 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:28,332 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:28,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:28,333 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:28,333 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:28,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-01-06 17:00:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:28,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:28,342 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:28,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:28,342 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:28,342 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:28,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 17:00:28,543 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1891178786, now seen corresponding path program 45 times [2021-01-06 17:00:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:28,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297318821] [2021-01-06 17:00:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:28,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297318821] [2021-01-06 17:00:28,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885047902] [2021-01-06 17:00:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:28,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:00:28,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:28,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:28,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:28,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175635515] [2021-01-06 17:00:28,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:28,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:28,732 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:28,808 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:28,809 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:28,809 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:28,810 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:28,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2021-01-06 17:00:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:28,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 16 [2021-01-06 17:00:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:28,817 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:28,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:28,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:28,818 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:29,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 17:00:29,032 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -647940314, now seen corresponding path program 46 times [2021-01-06 17:00:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:29,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446121628] [2021-01-06 17:00:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446121628] [2021-01-06 17:00:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963727022] [2021-01-06 17:00:29,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-01-06 17:00:29,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:29,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:29,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:00:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:29,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:29,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-01-06 17:00:29,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167668866] [2021-01-06 17:00:29,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:00:29,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:00:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:29,198 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 16 states. [2021-01-06 17:00:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:29,529 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:00:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:00:29,529 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2021-01-06 17:00:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:29,530 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:29,530 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:29,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:00:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-01-06 17:00:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:29,540 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:29,540 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:29,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:00:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:29,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:29,540 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:29,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:29,741 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash -649787356, now seen corresponding path program 47 times [2021-01-06 17:00:29,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:29,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745146516] [2021-01-06 17:00:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:29,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745146516] [2021-01-06 17:00:29,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511241920] [2021-01-06 17:00:29,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:29,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:00:29,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:29,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:29,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:29,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:29,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320719601] [2021-01-06 17:00:29,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:29,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:29,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:29,932 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:30,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:30,006 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:30,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:30,007 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:30,007 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:30,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-01-06 17:00:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:30,015 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:30,015 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:30,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:30,016 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:30,016 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:30,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 17:00:30,224 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:30,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1872019620, now seen corresponding path program 48 times [2021-01-06 17:00:30,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:30,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638972414] [2021-01-06 17:00:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:30,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638972414] [2021-01-06 17:00:30,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186330764] [2021-01-06 17:00:30,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:30,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 17:00:30,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:30,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:30,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:30,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564194067] [2021-01-06 17:00:30,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:30,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:30,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:30,430 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 15 states. [2021-01-06 17:00:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:30,511 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:30,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:30,512 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:30,512 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:30,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-01-06 17:00:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:30,520 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:30,520 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:30,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:30,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:30,521 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:30,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:30,725 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1870172578, now seen corresponding path program 49 times [2021-01-06 17:00:30,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:30,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258030641] [2021-01-06 17:00:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:30,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258030641] [2021-01-06 17:00:30,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615105818] [2021-01-06 17:00:30,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:30,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:30,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:30,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:30,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541786727] [2021-01-06 17:00:30,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:30,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:30,919 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:30,998 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:30,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:30,999 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:30,999 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:31,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-01-06 17:00:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:31,009 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-01-06 17:00:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:31,010 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:31,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:31,010 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:31,010 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:31,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 17:00:31,224 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1327998684, now seen corresponding path program 50 times [2021-01-06 17:00:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:31,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553960262] [2021-01-06 17:00:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:31,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553960262] [2021-01-06 17:00:31,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725186415] [2021-01-06 17:00:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:31,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:31,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:31,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:31,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:31,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:31,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:31,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783666703] [2021-01-06 17:00:31,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:31,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:31,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:31,417 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 15 states. [2021-01-06 17:00:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:31,483 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:31,484 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:31,484 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:31,484 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:31,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-01-06 17:00:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:31,497 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:31,498 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:31,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:31,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:31,498 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:31,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:31,705 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1329845726, now seen corresponding path program 51 times [2021-01-06 17:00:31,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:31,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570257244] [2021-01-06 17:00:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570257244] [2021-01-06 17:00:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749243935] [2021-01-06 17:00:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:31,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:00:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:31,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:31,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:31,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:31,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132693497] [2021-01-06 17:00:31,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:31,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:31,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:31,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:31,918 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:32,007 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:32,008 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:32,008 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:32,008 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:32,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-01-06 17:00:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:32,018 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2021-01-06 17:00:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:32,018 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:32,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:32,019 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:32,019 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:32,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-01-06 17:00:32,220 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 52 times [2021-01-06 17:00:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:32,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703898285] [2021-01-06 17:00:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:32,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703898285] [2021-01-06 17:00:32,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169277186] [2021-01-06 17:00:32,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:32,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:32,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:00:32,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:32,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:32,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-01-06 17:00:32,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119421198] [2021-01-06 17:00:32,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:00:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:32,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:00:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:32,397 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 16 states. [2021-01-06 17:00:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:32,780 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-01-06 17:00:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:00:32,781 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2021-01-06 17:00:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:32,782 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:00:32,782 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:00:32,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:00:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:00:32,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-01-06 17:00:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:32,796 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2021-01-06 17:00:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:32,796 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:32,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:00:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:32,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:32,797 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:33,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:33,013 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1190114208, now seen corresponding path program 5 times [2021-01-06 17:00:33,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:33,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613505756] [2021-01-06 17:00:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:33,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613505756] [2021-01-06 17:00:33,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771620428] [2021-01-06 17:00:33,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:33,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:00:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:33,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:33,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:33,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:33,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:00:33,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372971048] [2021-01-06 17:00:33,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:33,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:33,226 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 15 states. [2021-01-06 17:00:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:33,318 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-01-06 17:00:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:33,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2021-01-06 17:00:33,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:33,319 INFO L225 Difference]: With dead ends: 33 [2021-01-06 17:00:33,319 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 17:00:33,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 17:00:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-01-06 17:00:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 17:00:33,329 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 16 [2021-01-06 17:00:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:33,329 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 17:00:33,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 17:00:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:33,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:33,330 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:33,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 17:00:33,533 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1714863729, now seen corresponding path program 6 times [2021-01-06 17:00:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:33,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517735116] [2021-01-06 17:00:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517735116] [2021-01-06 17:00:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358433068] [2021-01-06 17:00:33,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:33,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:33,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:33,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:33,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:33,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:33,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438474771] [2021-01-06 17:00:33,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:33,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:33,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:33,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:33,761 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 17 states. [2021-01-06 17:00:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:33,851 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:33,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:33,852 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:33,852 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:33,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:00:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:33,867 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:33,868 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:33,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:33,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:33,868 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:34,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:34,082 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1716710771, now seen corresponding path program 53 times [2021-01-06 17:00:34,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:34,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000087197] [2021-01-06 17:00:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:34,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000087197] [2021-01-06 17:00:34,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223386815] [2021-01-06 17:00:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:34,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:34,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:34,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:34,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:34,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:34,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310782142] [2021-01-06 17:00:34,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:34,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:34,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:34,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:34,324 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:34,426 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:34,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:34,427 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:34,427 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:34,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-01-06 17:00:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:34,442 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:34,443 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:34,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:34,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:34,443 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:34,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 17:00:34,657 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash 805096205, now seen corresponding path program 54 times [2021-01-06 17:00:34,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:34,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19594409] [2021-01-06 17:00:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:34,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19594409] [2021-01-06 17:00:34,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690177933] [2021-01-06 17:00:34,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:34,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:34,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:34,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61874680] [2021-01-06 17:00:34,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:34,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:34,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:34,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:34,905 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 17 states. [2021-01-06 17:00:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:35,007 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:00:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:35,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:35,008 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:35,008 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:35,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2021-01-06 17:00:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:35,024 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:35,025 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:35,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:35,025 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:35,025 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:35,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 17:00:35,239 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:35,239 INFO L82 PathProgramCache]: Analyzing trace with hash 803249163, now seen corresponding path program 55 times [2021-01-06 17:00:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:35,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722202204] [2021-01-06 17:00:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722202204] [2021-01-06 17:00:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466233938] [2021-01-06 17:00:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:35,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:35,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:35,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78524359] [2021-01-06 17:00:35,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:35,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:35,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:35,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:35,463 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:35,566 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:35,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:35,567 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:35,567 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:35,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-01-06 17:00:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:35,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 18 [2021-01-06 17:00:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:35,579 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:35,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:35,580 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:35,580 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:35,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 17:00:35,781 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1900045197, now seen corresponding path program 56 times [2021-01-06 17:00:35,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:35,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268072283] [2021-01-06 17:00:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:35,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268072283] [2021-01-06 17:00:35,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372111232] [2021-01-06 17:00:35,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:35,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:36,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:36,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:36,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871369393] [2021-01-06 17:00:36,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:36,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:36,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:36,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:36,005 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 17 states. [2021-01-06 17:00:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:36,124 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:36,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:36,125 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:36,125 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:36,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:00:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:36,143 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:36,143 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:36,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:36,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:36,144 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:36,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:36,358 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1898198155, now seen corresponding path program 57 times [2021-01-06 17:00:36,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:36,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603738248] [2021-01-06 17:00:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:36,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603738248] [2021-01-06 17:00:36,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038366078] [2021-01-06 17:00:36,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:36,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:36,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:36,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:36,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:36,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392954863] [2021-01-06 17:00:36,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:36,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:36,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:36,616 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:36,726 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:36,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:36,727 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:36,727 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:36,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-01-06 17:00:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:36,743 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:36,743 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:36,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:36,744 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:36,744 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:36,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 17:00:36,957 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash 125037835, now seen corresponding path program 58 times [2021-01-06 17:00:36,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:36,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722534591] [2021-01-06 17:00:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:37,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722534591] [2021-01-06 17:00:37,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547965493] [2021-01-06 17:00:37,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:37,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:37,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:37,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:37,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:37,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:00:37,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969895469] [2021-01-06 17:00:37,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:37,187 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 18 states. [2021-01-06 17:00:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:37,636 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:00:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:00:37,637 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:00:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:37,637 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:00:37,638 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:00:37,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:00:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:00:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-01-06 17:00:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:37,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:37,655 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:37,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:37,655 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:37,655 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:37,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:37,869 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 123190793, now seen corresponding path program 59 times [2021-01-06 17:00:37,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:37,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614810808] [2021-01-06 17:00:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:37,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614810808] [2021-01-06 17:00:37,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927872655] [2021-01-06 17:00:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:37,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:38,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:38,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784251140] [2021-01-06 17:00:38,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:38,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:38,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:38,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:38,109 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:38,202 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:38,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:38,204 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:38,204 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:38,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2021-01-06 17:00:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:38,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2021-01-06 17:00:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:38,216 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:38,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:38,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:38,216 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:38,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-06 17:00:38,417 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:38,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:38,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1879038989, now seen corresponding path program 60 times [2021-01-06 17:00:38,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:38,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913522917] [2021-01-06 17:00:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:38,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913522917] [2021-01-06 17:00:38,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949357711] [2021-01-06 17:00:38,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:38,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:38,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:38,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:38,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891693667] [2021-01-06 17:00:38,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:38,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:38,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:38,638 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 17 states. [2021-01-06 17:00:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:38,736 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:38,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:38,737 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:38,737 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:38,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-01-06 17:00:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:38,755 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:38,756 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:38,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:38,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:38,756 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:38,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:38,963 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:38,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1877191947, now seen corresponding path program 61 times [2021-01-06 17:00:38,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:38,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060391411] [2021-01-06 17:00:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:39,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060391411] [2021-01-06 17:00:39,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598626983] [2021-01-06 17:00:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:39,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:39,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:39,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:39,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914624080] [2021-01-06 17:00:39,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:39,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:39,194 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:39,289 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:39,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:39,290 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:39,290 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:39,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-01-06 17:00:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:39,304 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:39,304 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:39,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:39,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:39,305 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:39,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:39,512 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash 104031627, now seen corresponding path program 62 times [2021-01-06 17:00:39,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:39,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648162012] [2021-01-06 17:00:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:39,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648162012] [2021-01-06 17:00:39,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857711831] [2021-01-06 17:00:39,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:39,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:39,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:39,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:39,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:39,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:39,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:39,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596593825] [2021-01-06 17:00:39,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:39,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:39,743 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 17 states. [2021-01-06 17:00:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:39,819 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:39,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:39,820 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:39,820 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:39,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-01-06 17:00:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:39,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:39,832 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:39,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:39,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:39,833 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:40,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:40,034 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash 102184585, now seen corresponding path program 63 times [2021-01-06 17:00:40,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:40,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079498545] [2021-01-06 17:00:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:40,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079498545] [2021-01-06 17:00:40,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795195952] [2021-01-06 17:00:40,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:40,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:40,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:40,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:40,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217358116] [2021-01-06 17:00:40,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:40,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:40,287 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:40,382 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:40,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:40,383 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:40,384 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:40,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2021-01-06 17:00:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:40,393 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 18 [2021-01-06 17:00:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:40,393 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:40,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:40,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:40,394 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:40,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-06 17:00:40,595 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:40,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1198980619, now seen corresponding path program 64 times [2021-01-06 17:00:40,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:40,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902712221] [2021-01-06 17:00:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902712221] [2021-01-06 17:00:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191418612] [2021-01-06 17:00:40,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-01-06 17:00:40,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:40,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:40,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:40,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:00:40,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63878087] [2021-01-06 17:00:40,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:40,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:40,802 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 18 states. [2021-01-06 17:00:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:41,219 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:00:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:00:41,219 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:00:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:41,220 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:00:41,220 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:00:41,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:00:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:00:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-01-06 17:00:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:41,238 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:41,238 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:41,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:41,238 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:41,238 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:41,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:41,439 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1197133577, now seen corresponding path program 65 times [2021-01-06 17:00:41,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:41,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490972283] [2021-01-06 17:00:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:41,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490972283] [2021-01-06 17:00:41,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341341961] [2021-01-06 17:00:41,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:41,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:41,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:41,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:41,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795280090] [2021-01-06 17:00:41,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:41,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:41,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:41,681 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:41,778 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:41,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:41,779 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:41,779 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:41,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-01-06 17:00:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:41,794 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:41,794 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:41,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:41,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:41,795 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:42,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:42,010 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash -576026743, now seen corresponding path program 66 times [2021-01-06 17:00:42,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:42,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457462130] [2021-01-06 17:00:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:42,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457462130] [2021-01-06 17:00:42,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693852096] [2021-01-06 17:00:42,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:42,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:42,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:42,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:42,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:42,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823127723] [2021-01-06 17:00:42,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:42,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:42,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:42,231 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 17 states. [2021-01-06 17:00:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:42,327 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-01-06 17:00:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:42,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:42,328 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:42,328 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:00:42,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:00:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-01-06 17:00:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:42,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:42,344 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:42,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:42,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:42,345 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:42,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 17:00:42,561 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash -577873785, now seen corresponding path program 67 times [2021-01-06 17:00:42,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:42,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887170312] [2021-01-06 17:00:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:42,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887170312] [2021-01-06 17:00:42,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6431700] [2021-01-06 17:00:42,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:42,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:42,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:42,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:42,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388597328] [2021-01-06 17:00:42,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:42,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:42,793 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:42,886 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-01-06 17:00:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:42,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:42,887 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:00:42,887 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:00:42,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:00:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2021-01-06 17:00:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:42,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 18 [2021-01-06 17:00:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:42,904 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:42,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:42,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:42,905 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:43,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 17:00:43,118 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1128057715, now seen corresponding path program 68 times [2021-01-06 17:00:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:43,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121429076] [2021-01-06 17:00:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:43,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121429076] [2021-01-06 17:00:43,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445869167] [2021-01-06 17:00:43,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:43,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:43,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:43,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:43,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:43,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:43,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961033886] [2021-01-06 17:00:43,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:43,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:43,342 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 17 states. [2021-01-06 17:00:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:43,439 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:43,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:43,440 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:43,441 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:43,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:00:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:43,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:43,455 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:43,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:43,455 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:43,455 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:43,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:43,657 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1129904757, now seen corresponding path program 69 times [2021-01-06 17:00:43,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:43,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757006572] [2021-01-06 17:00:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:43,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757006572] [2021-01-06 17:00:43,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183853445] [2021-01-06 17:00:43,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:43,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:43,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:43,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:43,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:43,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438962896] [2021-01-06 17:00:43,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:43,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:43,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:43,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:43,880 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:43,984 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:43,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:43,986 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:43,986 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:43,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-01-06 17:00:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:44,004 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:44,004 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:44,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:44,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:44,005 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:44,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:44,218 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1391902219, now seen corresponding path program 70 times [2021-01-06 17:00:44,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:44,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976669391] [2021-01-06 17:00:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:44,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976669391] [2021-01-06 17:00:44,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014317060] [2021-01-06 17:00:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:44,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:44,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:44,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:44,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:00:44,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132161366] [2021-01-06 17:00:44,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:44,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:44,444 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 18 states. [2021-01-06 17:00:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:44,913 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:00:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:00:44,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:00:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:44,915 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:00:44,915 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:00:44,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:00:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:00:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-01-06 17:00:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:44,929 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:44,929 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:44,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:44,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:44,930 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:45,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:45,143 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:45,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1390055177, now seen corresponding path program 71 times [2021-01-06 17:00:45,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:45,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496869307] [2021-01-06 17:00:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:45,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496869307] [2021-01-06 17:00:45,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504392191] [2021-01-06 17:00:45,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:45,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:45,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:45,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:45,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:45,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:45,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325397680] [2021-01-06 17:00:45,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:45,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:45,358 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:45,446 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:45,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:45,447 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:45,447 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:45,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-01-06 17:00:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:45,463 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 18 [2021-01-06 17:00:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:45,463 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:45,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:45,464 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:45,464 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:45,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:45,679 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:45,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1808116085, now seen corresponding path program 72 times [2021-01-06 17:00:45,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:45,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585374033] [2021-01-06 17:00:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585374033] [2021-01-06 17:00:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263838349] [2021-01-06 17:00:45,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:45,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:45,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:45,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:45,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:45,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342463045] [2021-01-06 17:00:45,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:45,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:45,900 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 17 states. [2021-01-06 17:00:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:45,988 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:45,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:45,990 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:45,990 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:45,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:00:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:46,006 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:46,006 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:46,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:46,007 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:46,007 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:46,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:46,213 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:46,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1809963127, now seen corresponding path program 73 times [2021-01-06 17:00:46,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:46,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097658406] [2021-01-06 17:00:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:46,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097658406] [2021-01-06 17:00:46,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038646983] [2021-01-06 17:00:46,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:46,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:46,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:46,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:46,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:46,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53669902] [2021-01-06 17:00:46,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:46,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:46,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:46,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:46,431 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:46,527 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:46,529 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:46,529 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:46,529 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:46,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-01-06 17:00:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:46,549 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:46,549 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:46,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:46,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:46,550 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:46,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-01-06 17:00:46,761 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 711843849, now seen corresponding path program 74 times [2021-01-06 17:00:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:46,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544907764] [2021-01-06 17:00:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:46,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544907764] [2021-01-06 17:00:46,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481990853] [2021-01-06 17:00:46,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:46,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:46,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:46,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:46,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:46,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:46,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354545358] [2021-01-06 17:00:46,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:46,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:46,996 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 17 states. [2021-01-06 17:00:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:47,102 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:00:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:47,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:47,104 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:47,104 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:47,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2021-01-06 17:00:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:47,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:47,126 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:47,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:47,126 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:47,127 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:47,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:47,342 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:47,342 INFO L82 PathProgramCache]: Analyzing trace with hash 709996807, now seen corresponding path program 75 times [2021-01-06 17:00:47,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:47,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490164824] [2021-01-06 17:00:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:47,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490164824] [2021-01-06 17:00:47,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915738321] [2021-01-06 17:00:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:47,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:47,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:47,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:47,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:47,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:47,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:47,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434003974] [2021-01-06 17:00:47,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:47,589 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:47,680 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:47,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:47,681 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:47,681 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:47,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2021-01-06 17:00:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:00:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:00:47,693 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2021-01-06 17:00:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:47,694 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:00:47,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:00:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:47,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:47,694 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:47,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 17:00:47,908 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1829122293, now seen corresponding path program 76 times [2021-01-06 17:00:47,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:47,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503512656] [2021-01-06 17:00:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:47,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503512656] [2021-01-06 17:00:47,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687447614] [2021-01-06 17:00:47,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:47,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:48,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:48,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:48,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:48,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:00:48,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935797461] [2021-01-06 17:00:48,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:48,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:48,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:48,122 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 18 states. [2021-01-06 17:00:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:48,610 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:00:48,610 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:00:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:48,611 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:48,611 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:48,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:00:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:00:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:48,625 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:48,625 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:48,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:48,626 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:48,626 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:48,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-06 17:00:48,827 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1830969335, now seen corresponding path program 77 times [2021-01-06 17:00:48,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:48,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046563072] [2021-01-06 17:00:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:48,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046563072] [2021-01-06 17:00:48,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567112620] [2021-01-06 17:00:48,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:48,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:48,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:48,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:48,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:49,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:49,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:49,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856443805] [2021-01-06 17:00:49,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:49,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:49,060 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:49,166 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:49,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:49,168 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:49,168 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:49,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-01-06 17:00:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:49,181 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:49,181 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:49,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:49,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:49,181 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:49,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:49,382 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash 690837641, now seen corresponding path program 78 times [2021-01-06 17:00:49,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:49,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018886317] [2021-01-06 17:00:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:49,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018886317] [2021-01-06 17:00:49,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441889890] [2021-01-06 17:00:49,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:49,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:49,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:49,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:49,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:49,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:49,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:49,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420214413] [2021-01-06 17:00:49,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:49,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:49,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:49,616 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 17 states. [2021-01-06 17:00:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:49,711 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:00:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:49,712 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:49,712 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:49,713 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:49,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-01-06 17:00:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:49,729 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:49,729 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:49,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:49,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:49,730 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:49,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:49,945 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash 688990599, now seen corresponding path program 79 times [2021-01-06 17:00:49,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:49,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677569988] [2021-01-06 17:00:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677569988] [2021-01-06 17:00:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059483770] [2021-01-06 17:00:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:50,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:50,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:50,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:50,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927883169] [2021-01-06 17:00:50,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:50,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:50,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:50,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:50,160 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:50,260 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:00:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:50,261 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:50,261 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:00:50,261 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:00:50,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:00:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2021-01-06 17:00:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:50,280 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 18 [2021-01-06 17:00:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:50,280 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:50,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:50,281 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:50,281 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:50,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:50,497 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1785786633, now seen corresponding path program 80 times [2021-01-06 17:00:50,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:50,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559398247] [2021-01-06 17:00:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:50,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559398247] [2021-01-06 17:00:50,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987069810] [2021-01-06 17:00:50,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:50,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:50,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:50,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:50,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529703469] [2021-01-06 17:00:50,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:50,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:50,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:50,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:50,733 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 17 states. [2021-01-06 17:00:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:50,831 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:50,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:50,832 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:50,832 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:50,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-01-06 17:00:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:50,846 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:50,846 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:50,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:50,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:50,847 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:51,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-01-06 17:00:51,048 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:51,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1783939591, now seen corresponding path program 81 times [2021-01-06 17:00:51,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:51,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865614650] [2021-01-06 17:00:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:51,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865614650] [2021-01-06 17:00:51,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933360488] [2021-01-06 17:00:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:51,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:51,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:51,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:51,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646859158] [2021-01-06 17:00:51,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:51,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:51,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:51,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:51,286 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:51,384 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:00:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:51,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:51,386 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:00:51,386 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:00:51,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:00:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-01-06 17:00:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:51,404 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:51,404 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:51,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:51,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:51,405 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:51,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:51,606 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:51,606 INFO L82 PathProgramCache]: Analyzing trace with hash 10779271, now seen corresponding path program 82 times [2021-01-06 17:00:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:51,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870824094] [2021-01-06 17:00:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:51,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870824094] [2021-01-06 17:00:51,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634233342] [2021-01-06 17:00:51,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:51,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:51,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:51,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:51,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:51,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:51,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:00:51,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083858458] [2021-01-06 17:00:51,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:51,838 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 18 states. [2021-01-06 17:00:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:52,287 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-01-06 17:00:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:00:52,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:00:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:52,288 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:00:52,288 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:00:52,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:00:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:00:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-01-06 17:00:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:52,310 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:52,310 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:52,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:52,311 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:52,311 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:52,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-01-06 17:00:52,524 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash 8932229, now seen corresponding path program 83 times [2021-01-06 17:00:52,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:52,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367365123] [2021-01-06 17:00:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367365123] [2021-01-06 17:00:52,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923202938] [2021-01-06 17:00:52,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:52,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:52,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:52,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:52,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:52,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:52,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:52,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202628834] [2021-01-06 17:00:52,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:52,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:52,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:52,731 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:52,823 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-01-06 17:00:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:52,824 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:52,824 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:00:52,825 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:00:52,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:00:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2021-01-06 17:00:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:00:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:00:52,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 18 [2021-01-06 17:00:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:52,835 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:00:52,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:00:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:52,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:52,836 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:53,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:53,037 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:53,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash -435000051, now seen corresponding path program 84 times [2021-01-06 17:00:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:53,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204957106] [2021-01-06 17:00:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:53,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204957106] [2021-01-06 17:00:53,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331682472] [2021-01-06 17:00:53,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:53,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:53,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:53,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:53,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064429907] [2021-01-06 17:00:53,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:53,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:53,290 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 17 states. [2021-01-06 17:00:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:53,419 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:00:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:53,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:53,420 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:00:53,420 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:00:53,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:00:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-01-06 17:00:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:00:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:00:53,450 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:00:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:53,450 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:00:53,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:00:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:53,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:53,451 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:53,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:53,667 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash -436847093, now seen corresponding path program 85 times [2021-01-06 17:00:53,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:53,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640993410] [2021-01-06 17:00:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640993410] [2021-01-06 17:00:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506076389] [2021-01-06 17:00:53,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:53,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:53,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:53,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151597543] [2021-01-06 17:00:53,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:53,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:53,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:53,892 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:00:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:54,001 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:00:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:54,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:54,003 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:00:54,003 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:00:54,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:00:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-01-06 17:00:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:54,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:54,021 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:54,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:54,021 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:54,021 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:54,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-06 17:00:54,222 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:54,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2084959883, now seen corresponding path program 86 times [2021-01-06 17:00:54,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:54,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4304283] [2021-01-06 17:00:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4304283] [2021-01-06 17:00:54,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228940291] [2021-01-06 17:00:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:54,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:54,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:54,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:54,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:54,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758274819] [2021-01-06 17:00:54,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:54,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:54,464 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:54,572 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:00:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:54,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:54,574 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:00:54,574 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:00:54,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:00:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-01-06 17:00:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:00:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:00:54,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:00:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:54,595 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:00:54,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:00:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:54,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:54,595 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:54,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:54,796 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2083112841, now seen corresponding path program 87 times [2021-01-06 17:00:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008408842] [2021-01-06 17:00:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:54,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008408842] [2021-01-06 17:00:54,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569466215] [2021-01-06 17:00:54,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:54,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:55,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:55,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534890089] [2021-01-06 17:00:55,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:55,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:55,043 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:00:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:55,154 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:00:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:55,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:55,155 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:00:55,155 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:00:55,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:00:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 27. [2021-01-06 17:00:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:00:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:00:55,176 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:00:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:55,176 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:00:55,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:00:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:55,177 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:55,177 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:55,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:55,377 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1115058421, now seen corresponding path program 88 times [2021-01-06 17:00:55,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:55,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630722486] [2021-01-06 17:00:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:55,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630722486] [2021-01-06 17:00:55,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741643758] [2021-01-06 17:00:55,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-01-06 17:00:55,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:55,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:55,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:55,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:55,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:00:55,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379754188] [2021-01-06 17:00:55,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:55,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:55,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:55,582 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 18 states. [2021-01-06 17:00:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:56,084 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:00:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:00:56,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:00:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:56,085 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:00:56,085 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:00:56,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:00:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:00:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 31. [2021-01-06 17:00:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:00:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:00:56,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:00:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:56,120 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:00:56,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:00:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:56,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:56,121 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:56,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-01-06 17:00:56,336 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:56,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1116905463, now seen corresponding path program 89 times [2021-01-06 17:00:56,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:56,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623833623] [2021-01-06 17:00:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623833623] [2021-01-06 17:00:56,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128343240] [2021-01-06 17:00:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:56,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:56,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:56,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:56,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:56,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:56,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562160634] [2021-01-06 17:00:56,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:56,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:56,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:56,577 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:00:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:56,685 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:00:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:56,686 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:56,687 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:00:56,687 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:00:56,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:00:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-01-06 17:00:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:56,714 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:56,714 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:56,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:56,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:56,715 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:56,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-06 17:00:56,930 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:56,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1404901513, now seen corresponding path program 90 times [2021-01-06 17:00:56,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099669346] [2021-01-06 17:00:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099669346] [2021-01-06 17:00:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185759595] [2021-01-06 17:00:57,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:57,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:57,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:57,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:57,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296927743] [2021-01-06 17:00:57,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:57,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:57,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:57,173 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:00:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:57,279 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:00:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:57,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:57,280 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:00:57,281 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:00:57,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:00:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-01-06 17:00:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:00:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:00:57,301 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:00:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:57,302 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:00:57,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:00:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:57,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:57,302 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:57,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-06 17:00:57,503 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1403054471, now seen corresponding path program 91 times [2021-01-06 17:00:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:57,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093475222] [2021-01-06 17:00:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:57,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093475222] [2021-01-06 17:00:57,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741597777] [2021-01-06 17:00:57,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:57,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:57,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:57,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217574626] [2021-01-06 17:00:57,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:57,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:57,733 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:00:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:57,838 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:00:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:57,839 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:57,840 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:00:57,840 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:00:57,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:00:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2021-01-06 17:00:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:00:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:00:57,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 18 [2021-01-06 17:00:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:57,857 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:00:57,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:00:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:57,857 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:57,858 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:58,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-06 17:00:58,058 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1136064629, now seen corresponding path program 92 times [2021-01-06 17:00:58,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:58,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792975482] [2021-01-06 17:00:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:58,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792975482] [2021-01-06 17:00:58,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522589616] [2021-01-06 17:00:58,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:58,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:58,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:58,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:58,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:58,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:58,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:58,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212708985] [2021-01-06 17:00:58,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:58,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:58,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:58,274 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 17 states. [2021-01-06 17:00:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:58,393 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:00:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:58,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:58,394 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:00:58,394 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:00:58,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:00:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-01-06 17:00:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:00:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:00:58,414 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:00:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:58,414 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:00:58,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:00:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:58,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:58,415 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:58,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-01-06 17:00:58,622 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1137911671, now seen corresponding path program 93 times [2021-01-06 17:00:58,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:58,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197279076] [2021-01-06 17:00:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:58,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197279076] [2021-01-06 17:00:58,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705983358] [2021-01-06 17:00:58,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:58,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:58,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:00:58,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:58,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:58,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:00:58,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847226672] [2021-01-06 17:00:58,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:58,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:58,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:58,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:58,843 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:00:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:58,954 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:00:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:00:58,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:00:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:58,956 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:00:58,956 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:00:58,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:00:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-01-06 17:00:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:00:58,975 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:00:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:58,975 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:00:58,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:00:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:58,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:58,976 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:59,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-06 17:00:59,181 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1383895305, now seen corresponding path program 94 times [2021-01-06 17:00:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:59,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923235451] [2021-01-06 17:00:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:59,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923235451] [2021-01-06 17:00:59,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981054934] [2021-01-06 17:00:59,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-01-06 17:00:59,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:59,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:59,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:59,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:59,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:00:59,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628631423] [2021-01-06 17:00:59,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:59,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:59,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:59,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:59,407 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 18 states. [2021-01-06 17:01:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:00,066 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2021-01-06 17:01:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:01:00,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:01:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:00,067 INFO L225 Difference]: With dead ends: 55 [2021-01-06 17:01:00,067 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:01:00,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:01:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:01:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2021-01-06 17:01:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:00,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:00,099 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:00,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:01:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:00,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:00,099 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:00,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-01-06 17:01:00,312 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1382048263, now seen corresponding path program 95 times [2021-01-06 17:01:00,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:00,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708181920] [2021-01-06 17:01:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:00,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708181920] [2021-01-06 17:01:00,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502746961] [2021-01-06 17:01:00,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:00,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:01:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:00,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:00,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:00,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121721034] [2021-01-06 17:01:00,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:00,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:00,526 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:00,640 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:00,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:00,641 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:00,641 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:00,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 27. [2021-01-06 17:01:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:01:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:01:00,670 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:01:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:00,671 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:01:00,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:01:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:00,671 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:00,671 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:00,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:00,872 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1816122999, now seen corresponding path program 96 times [2021-01-06 17:01:00,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:00,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134823625] [2021-01-06 17:01:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134823625] [2021-01-06 17:01:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657099481] [2021-01-06 17:01:00,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:00,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:01:00,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:00,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:01,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:01,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:01,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018259372] [2021-01-06 17:01:01,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:01,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:01,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:01,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:01,105 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 17 states. [2021-01-06 17:01:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:01,217 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:01,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:01,218 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:01,218 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:01,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 17:01:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:01,238 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:01,238 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:01,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:01,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:01,239 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:01,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:01,440 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:01,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1817970041, now seen corresponding path program 97 times [2021-01-06 17:01:01,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:01,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527783291] [2021-01-06 17:01:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:01,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527783291] [2021-01-06 17:01:01,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297595117] [2021-01-06 17:01:01,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:01,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:01,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:01,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339261406] [2021-01-06 17:01:01,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:01,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:01,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:01,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:01,641 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:01,754 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:01,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:01,755 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:01,755 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:01,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-01-06 17:01:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:01,778 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:01:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:01,778 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:01,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:01,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:01,778 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:01,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:01,979 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:01,979 INFO L82 PathProgramCache]: Analyzing trace with hash 703836935, now seen corresponding path program 98 times [2021-01-06 17:01:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:01,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830363869] [2021-01-06 17:01:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830363869] [2021-01-06 17:01:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512382231] [2021-01-06 17:01:02,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:02,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:02,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:02,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:02,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:02,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:02,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38711542] [2021-01-06 17:01:02,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:02,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:02,222 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:01:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:02,336 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:02,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:02,338 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:02,338 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:02,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-01-06 17:01:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:02,369 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:02,369 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:02,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:02,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:02,370 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:02,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:02,583 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash 701989893, now seen corresponding path program 99 times [2021-01-06 17:01:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:02,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463647469] [2021-01-06 17:01:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:02,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463647469] [2021-01-06 17:01:02,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308396870] [2021-01-06 17:01:02,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:02,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:01:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:02,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:02,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:02,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451625441] [2021-01-06 17:01:02,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:02,816 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:02,930 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:02,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:02,931 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:02,931 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:02,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2021-01-06 17:01:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:01:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:01:02,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2021-01-06 17:01:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:02,946 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:01:02,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:01:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:02,947 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:02,947 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:03,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-01-06 17:01:03,148 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash 151805963, now seen corresponding path program 100 times [2021-01-06 17:01:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:03,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963312926] [2021-01-06 17:01:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963312926] [2021-01-06 17:01:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282694407] [2021-01-06 17:01:03,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:03,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:03,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:01:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:03,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:03,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:01:03,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625559882] [2021-01-06 17:01:03,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:01:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:01:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:01:03,393 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 18 states. [2021-01-06 17:01:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:03,926 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:01:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:01:03,926 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:01:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:03,927 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:01:03,927 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:01:03,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:01:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:01:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2021-01-06 17:01:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:03,961 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:03,962 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:03,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:01:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:03,962 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:03,962 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:04,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-01-06 17:01:04,176 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash 149958921, now seen corresponding path program 101 times [2021-01-06 17:01:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:04,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676547308] [2021-01-06 17:01:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:04,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676547308] [2021-01-06 17:01:04,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716381467] [2021-01-06 17:01:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:04,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:01:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:04,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:04,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:04,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:04,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641341626] [2021-01-06 17:01:04,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:04,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:04,415 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:04,529 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:04,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:04,531 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:04,531 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:04,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-01-06 17:01:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:04,560 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:01:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:04,560 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:04,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:04,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:04,561 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:04,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-06 17:01:04,762 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:04,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1623201399, now seen corresponding path program 102 times [2021-01-06 17:01:04,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:04,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374118977] [2021-01-06 17:01:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:04,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374118977] [2021-01-06 17:01:04,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415995757] [2021-01-06 17:01:04,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:04,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:01:04,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:04,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:05,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:05,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75402658] [2021-01-06 17:01:05,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:05,005 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:01:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:05,117 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:05,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:05,118 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:05,118 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:05,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2021-01-06 17:01:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:05,139 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:05,139 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:05,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:05,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:05,140 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:05,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-06 17:01:05,341 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1625048441, now seen corresponding path program 103 times [2021-01-06 17:01:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:05,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135888225] [2021-01-06 17:01:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:05,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135888225] [2021-01-06 17:01:05,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437500498] [2021-01-06 17:01:05,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:05,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:05,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:05,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695267886] [2021-01-06 17:01:05,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:05,581 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:05,699 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:05,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:05,700 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:05,701 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:05,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-01-06 17:01:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:01:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:01:05,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:01:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:05,720 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:01:05,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:01:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:05,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:05,721 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:05,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:05,921 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:05,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:05,922 INFO L82 PathProgramCache]: Analyzing trace with hash -528252407, now seen corresponding path program 104 times [2021-01-06 17:01:05,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:05,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447528200] [2021-01-06 17:01:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:05,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447528200] [2021-01-06 17:01:05,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178306176] [2021-01-06 17:01:05,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:06,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:06,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:06,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:06,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817635257] [2021-01-06 17:01:06,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:06,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:06,154 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 17 states. [2021-01-06 17:01:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:06,266 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:06,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:06,267 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:06,267 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:06,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-01-06 17:01:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:06,289 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:06,289 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:06,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:06,289 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:06,289 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:06,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-01-06 17:01:06,490 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:06,491 INFO L82 PathProgramCache]: Analyzing trace with hash -530099449, now seen corresponding path program 105 times [2021-01-06 17:01:06,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:06,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729210992] [2021-01-06 17:01:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:06,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729210992] [2021-01-06 17:01:06,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781064029] [2021-01-06 17:01:06,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:06,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:01:06,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:06,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:06,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:06,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789884991] [2021-01-06 17:01:06,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:06,704 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:06,838 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:06,839 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:06,839 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:06,839 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:06,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-01-06 17:01:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:06,874 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:01:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:06,874 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:06,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:06,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:06,875 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:07,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:07,089 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1991707527, now seen corresponding path program 106 times [2021-01-06 17:01:07,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:07,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318836165] [2021-01-06 17:01:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:07,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318836165] [2021-01-06 17:01:07,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069018286] [2021-01-06 17:01:07,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:07,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:07,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:07,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:01:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:07,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:07,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:01:07,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742576740] [2021-01-06 17:01:07,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:01:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:07,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:01:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:01:07,318 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 18 states. [2021-01-06 17:01:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:07,824 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2021-01-06 17:01:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:01:07,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:01:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:07,825 INFO L225 Difference]: With dead ends: 47 [2021-01-06 17:01:07,826 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 17:01:07,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:01:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 17:01:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-01-06 17:01:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:07,848 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:07,848 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:07,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:01:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:07,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:07,848 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:08,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-01-06 17:01:08,049 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:08,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1989860485, now seen corresponding path program 107 times [2021-01-06 17:01:08,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:08,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111385688] [2021-01-06 17:01:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111385688] [2021-01-06 17:01:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283066165] [2021-01-06 17:01:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:08,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:01:08,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:08,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:08,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:08,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892318070] [2021-01-06 17:01:08,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:08,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:08,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:08,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:08,273 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:08,385 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:08,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:08,387 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:08,387 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:08,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-01-06 17:01:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:01:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:01:08,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 18 [2021-01-06 17:01:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:08,403 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:01:08,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:01:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:08,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:08,404 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:08,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-01-06 17:01:08,606 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash -549258615, now seen corresponding path program 108 times [2021-01-06 17:01:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:08,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922183803] [2021-01-06 17:01:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:08,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922183803] [2021-01-06 17:01:08,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953729369] [2021-01-06 17:01:08,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:08,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:01:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:08,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:08,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:08,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599806989] [2021-01-06 17:01:08,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:08,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:08,842 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 17 states. [2021-01-06 17:01:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:08,962 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:08,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:08,963 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:08,963 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:08,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-01-06 17:01:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:08,999 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:08,999 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:08,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:09,000 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:09,000 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:09,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:09,215 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash -551105657, now seen corresponding path program 109 times [2021-01-06 17:01:09,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:09,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127785356] [2021-01-06 17:01:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:09,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127785356] [2021-01-06 17:01:09,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018018409] [2021-01-06 17:01:09,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:09,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:09,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:09,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877894441] [2021-01-06 17:01:09,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:09,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:09,432 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:09,547 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:01:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:09,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:09,548 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:01:09,548 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:01:09,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:01:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-01-06 17:01:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:09,571 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:01:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:09,571 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:09,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:09,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:09,571 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:09,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:09,775 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:09,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1970701319, now seen corresponding path program 110 times [2021-01-06 17:01:09,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:09,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783513032] [2021-01-06 17:01:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:09,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783513032] [2021-01-06 17:01:09,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957018217] [2021-01-06 17:01:09,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:09,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:10,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:10,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:10,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866005088] [2021-01-06 17:01:10,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:10,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:10,002 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:01:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:10,097 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:10,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:10,099 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:10,099 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:10,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-01-06 17:01:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:10,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:10,122 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:10,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:10,123 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:10,123 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:10,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-01-06 17:01:10,324 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1968854277, now seen corresponding path program 111 times [2021-01-06 17:01:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:10,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684903738] [2021-01-06 17:01:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:10,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684903738] [2021-01-06 17:01:10,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990765154] [2021-01-06 17:01:10,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:10,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:01:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:10,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:10,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:10,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544379020] [2021-01-06 17:01:10,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:10,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:10,538 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:10,645 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:01:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:10,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:10,646 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:01:10,646 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:01:10,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:01:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-01-06 17:01:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:01:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:01:10,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-01-06 17:01:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:10,673 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:01:10,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:01:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:10,674 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:10,674 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:10,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:10,875 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1229316985, now seen corresponding path program 112 times [2021-01-06 17:01:10,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226922133] [2021-01-06 17:01:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:10,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226922133] [2021-01-06 17:01:10,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56690750] [2021-01-06 17:01:10,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:10,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:10,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:10,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:01:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:11,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:11,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-01-06 17:01:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122346786] [2021-01-06 17:01:11,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:01:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:01:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:01:11,098 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 18 states. [2021-01-06 17:01:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:11,568 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:01:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:01:11,568 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2021-01-06 17:01:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:11,569 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:01:11,569 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:01:11,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:01:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:01:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-01-06 17:01:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:11,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:11,598 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:11,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:01:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:11,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:11,598 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:11,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-01-06 17:01:11,799 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1231164027, now seen corresponding path program 113 times [2021-01-06 17:01:11,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:11,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535386835] [2021-01-06 17:01:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:11,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535386835] [2021-01-06 17:01:11,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39183413] [2021-01-06 17:01:11,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:11,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:01:11,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:11,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:12,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:12,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641702290] [2021-01-06 17:01:12,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:12,037 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:12,150 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:01:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:12,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:12,152 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:01:12,152 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:01:12,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:01:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-01-06 17:01:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:12,176 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 18 [2021-01-06 17:01:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:12,176 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:12,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:12,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:12,176 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:12,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-01-06 17:01:12,377 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 114 times [2021-01-06 17:01:12,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:12,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244946164] [2021-01-06 17:01:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:12,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244946164] [2021-01-06 17:01:12,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362544567] [2021-01-06 17:01:12,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:12,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:01:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:12,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:12,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:12,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015705090] [2021-01-06 17:01:12,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:12,600 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 17 states. [2021-01-06 17:01:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:12,714 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-01-06 17:01:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:12,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:12,716 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:01:12,716 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 17:01:12,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 17:01:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-01-06 17:01:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:12,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 18 [2021-01-06 17:01:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:12,740 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:12,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:01:12,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:12,741 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:12,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-01-06 17:01:12,943 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:12,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1288795907, now seen corresponding path program 6 times [2021-01-06 17:01:12,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:12,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955617396] [2021-01-06 17:01:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:13,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955617396] [2021-01-06 17:01:13,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589580002] [2021-01-06 17:01:13,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:13,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:01:13,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:01:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:13,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:13,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:01:13,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982174911] [2021-01-06 17:01:13,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:01:13,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:13,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:01:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:13,182 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 17 states. [2021-01-06 17:01:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:13,268 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-01-06 17:01:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:01:13,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 17:01:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:13,270 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:01:13,270 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:01:13,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:01:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:01:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2021-01-06 17:01:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:01:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-01-06 17:01:13,285 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 18 [2021-01-06 17:01:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:13,286 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-01-06 17:01:13,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:01:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-01-06 17:01:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:13,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:13,286 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:13,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:13,500 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1335587892, now seen corresponding path program 7 times [2021-01-06 17:01:13,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:13,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566747351] [2021-01-06 17:01:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566747351] [2021-01-06 17:01:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927135191] [2021-01-06 17:01:13,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:13,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:13,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:13,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:13,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439009627] [2021-01-06 17:01:13,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:13,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:13,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:13,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:13,771 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 19 states. [2021-01-06 17:01:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:13,907 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:01:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:13,907 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:13,908 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:01:13,908 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:01:13,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:01:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:01:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:13,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:13,937 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:13,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:13,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:13,938 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:14,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-01-06 17:01:14,146 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1333740850, now seen corresponding path program 115 times [2021-01-06 17:01:14,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:14,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473317248] [2021-01-06 17:01:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:14,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473317248] [2021-01-06 17:01:14,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725969206] [2021-01-06 17:01:14,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:14,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:14,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:14,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:14,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205915944] [2021-01-06 17:01:14,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:14,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:14,425 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:14,552 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:14,553 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:14,554 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:14,554 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:14,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-01-06 17:01:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:14,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:14,595 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:14,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:14,596 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:14,596 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:14,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-01-06 17:01:14,810 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash -439419470, now seen corresponding path program 116 times [2021-01-06 17:01:14,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:14,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371264265] [2021-01-06 17:01:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:14,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371264265] [2021-01-06 17:01:14,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132623373] [2021-01-06 17:01:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:14,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:14,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:15,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:15,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:15,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583920089] [2021-01-06 17:01:15,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:15,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:15,096 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:15,247 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:01:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:15,247 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:15,248 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:01:15,248 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:01:15,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:01:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:01:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:15,275 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:15,275 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:15,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:15,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:15,276 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:15,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:15,477 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash -441266512, now seen corresponding path program 117 times [2021-01-06 17:01:15,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:15,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768810995] [2021-01-06 17:01:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768810995] [2021-01-06 17:01:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049258535] [2021-01-06 17:01:15,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:15,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:15,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:15,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:15,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335892842] [2021-01-06 17:01:15,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:15,749 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:15,880 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:15,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:15,881 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:15,882 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:15,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2021-01-06 17:01:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:15,910 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:15,910 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:15,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:15,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:15,911 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:16,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:16,112 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:16,112 INFO L82 PathProgramCache]: Analyzing trace with hash 655529522, now seen corresponding path program 118 times [2021-01-06 17:01:16,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:16,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473258980] [2021-01-06 17:01:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:16,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473258980] [2021-01-06 17:01:16,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884381827] [2021-01-06 17:01:16,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:16,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:16,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:16,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:16,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:16,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:16,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:16,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516132286] [2021-01-06 17:01:16,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:16,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:16,370 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 20 states. [2021-01-06 17:01:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:16,939 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:01:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:01:16,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:16,940 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:01:16,940 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:01:16,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:01:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:01:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 33. [2021-01-06 17:01:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:16,968 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:16,968 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:16,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:16,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:16,969 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:17,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:17,170 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash 653682480, now seen corresponding path program 119 times [2021-01-06 17:01:17,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:17,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109256011] [2021-01-06 17:01:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:17,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109256011] [2021-01-06 17:01:17,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971193441] [2021-01-06 17:01:17,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:17,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:17,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:17,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:17,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:17,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626112592] [2021-01-06 17:01:17,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:17,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:17,463 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:17,593 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:17,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:17,594 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:17,594 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:17,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 17:01:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:17,625 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:17,625 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:17,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:17,625 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:17,625 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:17,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-01-06 17:01:17,826 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1119477840, now seen corresponding path program 120 times [2021-01-06 17:01:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:17,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568070205] [2021-01-06 17:01:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:17,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568070205] [2021-01-06 17:01:17,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821818682] [2021-01-06 17:01:17,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:17,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:17,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:18,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:18,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:18,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004848163] [2021-01-06 17:01:18,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:18,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:18,094 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:18,218 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:18,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:18,219 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:18,219 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:18,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-01-06 17:01:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:18,248 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:18,249 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:18,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:18,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:18,249 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:18,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-01-06 17:01:18,450 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:18,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1121324882, now seen corresponding path program 121 times [2021-01-06 17:01:18,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:18,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117295653] [2021-01-06 17:01:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:18,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117295653] [2021-01-06 17:01:18,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068180139] [2021-01-06 17:01:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:18,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:18,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:18,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:18,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267541205] [2021-01-06 17:01:18,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:18,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:18,713 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:18,829 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:18,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:18,830 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:18,830 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:18,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2021-01-06 17:01:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:01:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:01:18,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 20 [2021-01-06 17:01:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:18,853 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:01:18,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:01:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:18,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:18,854 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:19,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-01-06 17:01:19,055 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash 634523314, now seen corresponding path program 122 times [2021-01-06 17:01:19,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:19,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931032679] [2021-01-06 17:01:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:19,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931032679] [2021-01-06 17:01:19,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142376848] [2021-01-06 17:01:19,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:19,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:19,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:19,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:19,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730764038] [2021-01-06 17:01:19,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:19,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:19,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:19,302 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 19 states. [2021-01-06 17:01:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:19,449 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:01:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:19,449 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:19,450 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:01:19,450 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:01:19,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:01:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:01:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:19,478 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:19,478 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:19,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:19,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:19,480 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:19,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-01-06 17:01:19,697 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 632676272, now seen corresponding path program 123 times [2021-01-06 17:01:19,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:19,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444999314] [2021-01-06 17:01:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:19,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444999314] [2021-01-06 17:01:19,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852093058] [2021-01-06 17:01:19,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:19,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:19,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:19,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:19,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:19,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311421008] [2021-01-06 17:01:19,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:19,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:19,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:19,959 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:20,104 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:20,104 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:20,105 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:20,105 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:20,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-01-06 17:01:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:20,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:20,146 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:20,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:20,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:20,146 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:20,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:20,347 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1140484048, now seen corresponding path program 124 times [2021-01-06 17:01:20,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:20,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818618886] [2021-01-06 17:01:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:20,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818618886] [2021-01-06 17:01:20,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129124409] [2021-01-06 17:01:20,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:20,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:20,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:20,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:20,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:20,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385101572] [2021-01-06 17:01:20,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:20,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:20,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:20,602 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:01:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:21,196 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:01:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:01:21,196 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:21,197 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:01:21,197 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:01:21,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:01:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:01:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-01-06 17:01:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:21,226 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:21,226 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:21,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:21,226 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:21,226 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:21,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-01-06 17:01:21,427 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1142331090, now seen corresponding path program 125 times [2021-01-06 17:01:21,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:21,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565419102] [2021-01-06 17:01:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565419102] [2021-01-06 17:01:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109698275] [2021-01-06 17:01:21,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:21,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:21,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:21,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:21,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:21,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137730505] [2021-01-06 17:01:21,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:21,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:21,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:21,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:21,698 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:21,837 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:21,838 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:21,838 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:21,838 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:21,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2021-01-06 17:01:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:21,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:21,881 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:21,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:21,881 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:21,882 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:22,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-01-06 17:01:22,095 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:22,096 INFO L82 PathProgramCache]: Analyzing trace with hash -45535056, now seen corresponding path program 126 times [2021-01-06 17:01:22,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:22,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149316372] [2021-01-06 17:01:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:22,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149316372] [2021-01-06 17:01:22,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326692452] [2021-01-06 17:01:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:22,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:22,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:22,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:22,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149014566] [2021-01-06 17:01:22,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:22,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:22,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:22,348 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:01:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:22,510 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:22,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:22,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:22,511 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:22,511 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:22,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:22,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:01:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:22,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:22,549 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:22,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:22,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:22,549 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:22,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:22,750 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:22,751 INFO L82 PathProgramCache]: Analyzing trace with hash -47382098, now seen corresponding path program 127 times [2021-01-06 17:01:22,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:22,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046758312] [2021-01-06 17:01:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046758312] [2021-01-06 17:01:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260954125] [2021-01-06 17:01:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:23,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:23,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:23,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703283798] [2021-01-06 17:01:23,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:23,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:23,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:23,035 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:23,158 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:23,159 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:23,160 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:23,160 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:23,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 17:01:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:23,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:23,190 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:23,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:23,190 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:23,190 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:23,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:23,391 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1820542418, now seen corresponding path program 128 times [2021-01-06 17:01:23,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:23,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160680058] [2021-01-06 17:01:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160680058] [2021-01-06 17:01:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819115518] [2021-01-06 17:01:23,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:23,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:23,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:23,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:23,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:23,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:23,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:23,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096568320] [2021-01-06 17:01:23,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:23,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:23,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:23,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:23,657 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:23,782 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:23,783 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:23,783 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:23,784 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:23,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-01-06 17:01:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:23,814 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:23,814 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:23,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:23,815 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:23,815 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:24,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:24,016 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1822389460, now seen corresponding path program 129 times [2021-01-06 17:01:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:24,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136163034] [2021-01-06 17:01:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:24,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136163034] [2021-01-06 17:01:24,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828818878] [2021-01-06 17:01:24,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:24,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:24,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:24,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:24,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:24,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:24,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821413846] [2021-01-06 17:01:24,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:24,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:24,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:24,288 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:24,401 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:24,402 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:24,402 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:24,402 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:24,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2021-01-06 17:01:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:01:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:01:24,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 20 [2021-01-06 17:01:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:24,426 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:01:24,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:01:24,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:24,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:24,427 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:24,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-01-06 17:01:24,628 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1922393906, now seen corresponding path program 130 times [2021-01-06 17:01:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:24,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987573327] [2021-01-06 17:01:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:24,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987573327] [2021-01-06 17:01:24,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145275817] [2021-01-06 17:01:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:24,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:24,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:24,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876379984] [2021-01-06 17:01:24,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:24,892 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 20 states. [2021-01-06 17:01:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:25,515 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-01-06 17:01:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:01:25,515 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:25,516 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:01:25,516 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:01:25,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:01:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:01:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2021-01-06 17:01:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:25,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:25,549 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:25,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:25,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:25,549 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:25,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-01-06 17:01:25,750 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546864, now seen corresponding path program 131 times [2021-01-06 17:01:25,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:25,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904490545] [2021-01-06 17:01:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:25,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904490545] [2021-01-06 17:01:25,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056848459] [2021-01-06 17:01:25,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:25,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:25,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:26,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:26,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:26,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648877821] [2021-01-06 17:01:26,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:26,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:26,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:26,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:26,028 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:26,164 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:26,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:26,165 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:26,165 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:26,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 17:01:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:26,203 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:26,203 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:26,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:26,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:26,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:26,204 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:26,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-01-06 17:01:26,404 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:26,405 INFO L82 PathProgramCache]: Analyzing trace with hash 147386544, now seen corresponding path program 132 times [2021-01-06 17:01:26,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:26,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390583323] [2021-01-06 17:01:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:26,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390583323] [2021-01-06 17:01:26,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666614470] [2021-01-06 17:01:26,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:26,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:26,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:26,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:26,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:26,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741285024] [2021-01-06 17:01:26,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:26,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:26,700 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:26,839 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:26,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:26,840 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:26,840 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:26,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2021-01-06 17:01:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:26,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:26,874 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:26,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:26,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:26,874 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:27,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-01-06 17:01:27,075 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash 145539502, now seen corresponding path program 133 times [2021-01-06 17:01:27,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:27,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68708290] [2021-01-06 17:01:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68708290] [2021-01-06 17:01:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274611359] [2021-01-06 17:01:27,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:27,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:27,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989157533] [2021-01-06 17:01:27,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:27,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:27,363 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:27,500 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:27,501 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:27,506 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:27,507 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:27,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:01:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:27,537 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:27,537 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:27,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:27,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:27,537 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:27,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-01-06 17:01:27,738 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1242335536, now seen corresponding path program 134 times [2021-01-06 17:01:27,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:27,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681804422] [2021-01-06 17:01:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:27,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681804422] [2021-01-06 17:01:27,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952828743] [2021-01-06 17:01:27,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:27,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:27,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:27,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:28,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:28,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:28,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122798069] [2021-01-06 17:01:28,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:28,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:28,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:28,028 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:01:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:28,159 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:28,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:28,161 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:28,161 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:28,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-01-06 17:01:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:28,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:28,192 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:28,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:28,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:28,193 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:28,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:28,393 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:28,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1240488494, now seen corresponding path program 135 times [2021-01-06 17:01:28,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:28,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380324743] [2021-01-06 17:01:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:28,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380324743] [2021-01-06 17:01:28,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180734030] [2021-01-06 17:01:28,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:28,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:28,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:28,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:28,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:28,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:28,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:28,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092582508] [2021-01-06 17:01:28,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:28,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:28,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:28,675 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:28,805 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:28,806 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:28,806 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:28,806 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:28,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 17:01:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:28,835 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:28,835 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:28,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:28,836 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:28,836 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:29,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-01-06 17:01:29,038 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash -532671826, now seen corresponding path program 136 times [2021-01-06 17:01:29,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:29,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800962608] [2021-01-06 17:01:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:29,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800962608] [2021-01-06 17:01:29,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510455179] [2021-01-06 17:01:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:29,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:29,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:29,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:29,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:29,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:29,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417123006] [2021-01-06 17:01:29,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:29,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:29,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:29,310 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:01:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:29,916 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:01:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:01:29,916 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:29,917 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:01:29,917 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:01:29,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:01:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:01:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-01-06 17:01:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:29,949 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:29,949 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:29,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:29,950 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:29,950 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:30,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-01-06 17:01:30,151 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:30,151 INFO L82 PathProgramCache]: Analyzing trace with hash -534518868, now seen corresponding path program 137 times [2021-01-06 17:01:30,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:30,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001041975] [2021-01-06 17:01:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:30,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001041975] [2021-01-06 17:01:30,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522059600] [2021-01-06 17:01:30,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:30,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:30,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:30,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:30,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:30,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:30,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297639574] [2021-01-06 17:01:30,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:30,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:30,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:30,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:30,409 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:30,550 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:30,550 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:30,551 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:30,551 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:30,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-01-06 17:01:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:01:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:01:30,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 20 [2021-01-06 17:01:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:30,575 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:01:30,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:01:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:30,575 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:30,575 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:30,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:30,776 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1221329328, now seen corresponding path program 138 times [2021-01-06 17:01:30,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:30,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202353118] [2021-01-06 17:01:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:30,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202353118] [2021-01-06 17:01:30,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766321149] [2021-01-06 17:01:30,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:30,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:30,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:30,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:31,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:31,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:31,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115375266] [2021-01-06 17:01:31,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:31,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:31,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:31,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:31,063 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 19 states. [2021-01-06 17:01:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:31,201 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:31,202 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:31,202 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:31,203 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:31,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-01-06 17:01:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:31,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:31,239 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:31,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:31,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:31,239 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:31,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:31,440 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1219482286, now seen corresponding path program 139 times [2021-01-06 17:01:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:31,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019512553] [2021-01-06 17:01:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:31,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019512553] [2021-01-06 17:01:31,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961056351] [2021-01-06 17:01:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:31,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:31,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:31,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:31,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971146713] [2021-01-06 17:01:31,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:31,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:31,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:31,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:31,723 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:31,857 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:31,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:31,858 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:31,858 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:31,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-01-06 17:01:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:31,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:31,890 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:31,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:31,890 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:31,891 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:32,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:32,101 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:32,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:32,101 INFO L82 PathProgramCache]: Analyzing trace with hash -553678034, now seen corresponding path program 140 times [2021-01-06 17:01:32,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:32,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039709340] [2021-01-06 17:01:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:32,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039709340] [2021-01-06 17:01:32,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876810080] [2021-01-06 17:01:32,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:32,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:32,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:32,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:32,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:32,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:32,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863390979] [2021-01-06 17:01:32,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:32,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:32,388 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:32,522 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:32,523 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:32,523 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:32,523 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:32,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-01-06 17:01:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:32,556 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:32,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:32,556 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:32,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:32,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:32,556 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:32,557 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:32,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:32,757 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash -555525076, now seen corresponding path program 141 times [2021-01-06 17:01:32,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:32,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220485167] [2021-01-06 17:01:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:32,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220485167] [2021-01-06 17:01:32,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759601185] [2021-01-06 17:01:32,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:32,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:32,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:32,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:33,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:33,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:33,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021097671] [2021-01-06 17:01:33,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:33,046 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:33,179 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:33,180 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:33,180 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:33,180 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:33,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2021-01-06 17:01:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:33,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:33,208 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:33,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:33,208 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:33,208 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:33,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-01-06 17:01:33,409 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash 541270958, now seen corresponding path program 142 times [2021-01-06 17:01:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:33,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165706394] [2021-01-06 17:01:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:33,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165706394] [2021-01-06 17:01:33,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819680170] [2021-01-06 17:01:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:33,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:33,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:33,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:33,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788624884] [2021-01-06 17:01:33,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:33,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:33,678 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 20 states. [2021-01-06 17:01:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:34,301 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:01:34,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:34,302 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:34,302 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:34,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:01:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2021-01-06 17:01:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:34,335 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:34,335 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:34,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:34,336 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:34,336 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:34,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:34,551 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash 539423916, now seen corresponding path program 143 times [2021-01-06 17:01:34,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:34,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938114763] [2021-01-06 17:01:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:34,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938114763] [2021-01-06 17:01:34,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633891903] [2021-01-06 17:01:34,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:34,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:34,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:34,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:34,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360469059] [2021-01-06 17:01:34,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:34,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:34,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:34,814 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:34,926 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:01:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:34,926 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:34,927 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:01:34,927 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:01:34,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:01:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-01-06 17:01:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:34,962 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:34,962 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:34,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:34,962 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:34,962 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:35,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-01-06 17:01:35,163 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1233736404, now seen corresponding path program 144 times [2021-01-06 17:01:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:35,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769359474] [2021-01-06 17:01:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769359474] [2021-01-06 17:01:35,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942652272] [2021-01-06 17:01:35,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:35,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:35,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:35,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:35,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419501314] [2021-01-06 17:01:35,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:35,452 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:35,580 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:01:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:35,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:35,581 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:01:35,581 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:01:35,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:01:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 17:01:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:35,612 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:35,612 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:35,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:35,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:35,613 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:35,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-01-06 17:01:35,814 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:35,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1235583446, now seen corresponding path program 145 times [2021-01-06 17:01:35,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:35,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286867405] [2021-01-06 17:01:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:35,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286867405] [2021-01-06 17:01:35,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930946358] [2021-01-06 17:01:35,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:35,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:36,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:36,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748576137] [2021-01-06 17:01:36,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:36,090 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:36,202 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2021-01-06 17:01:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:36,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:36,203 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:01:36,203 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:01:36,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:01:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-01-06 17:01:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:01:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:01:36,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 20 [2021-01-06 17:01:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:36,224 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:01:36,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:01:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:36,224 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:36,225 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:36,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-01-06 17:01:36,425 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1679515726, now seen corresponding path program 146 times [2021-01-06 17:01:36,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:36,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701968890] [2021-01-06 17:01:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:36,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701968890] [2021-01-06 17:01:36,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720107177] [2021-01-06 17:01:36,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:36,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:36,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:36,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:36,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:36,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234022599] [2021-01-06 17:01:36,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:36,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:36,696 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 19 states. [2021-01-06 17:01:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:36,852 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:01:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:36,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:36,853 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:01:36,853 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:01:36,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:01:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:01:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:36,889 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:36,889 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:36,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:36,889 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:36,889 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:37,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:37,090 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1681362768, now seen corresponding path program 147 times [2021-01-06 17:01:37,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:37,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370274610] [2021-01-06 17:01:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:37,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370274610] [2021-01-06 17:01:37,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128540029] [2021-01-06 17:01:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:37,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:37,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:37,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:37,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:37,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:37,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:37,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277904944] [2021-01-06 17:01:37,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:37,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:37,378 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:37,538 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:37,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:37,540 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:37,540 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:37,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-01-06 17:01:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:37,584 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:37,584 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:37,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:37,584 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:37,584 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:37,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-01-06 17:01:37,785 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:37,786 INFO L82 PathProgramCache]: Analyzing trace with hash 840444208, now seen corresponding path program 148 times [2021-01-06 17:01:37,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:37,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879544044] [2021-01-06 17:01:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:37,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879544044] [2021-01-06 17:01:37,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661437141] [2021-01-06 17:01:37,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:37,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:37,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:37,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:37,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:38,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:38,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:38,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538231893] [2021-01-06 17:01:38,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:38,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:38,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:38,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:38,067 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:01:38,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:38,768 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:01:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:01:38,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:38,769 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:01:38,769 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:01:38,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:01:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:01:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-01-06 17:01:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:38,810 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:38,811 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:38,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:38,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:38,811 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:39,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:39,018 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash 838597166, now seen corresponding path program 149 times [2021-01-06 17:01:39,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:39,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814787449] [2021-01-06 17:01:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:39,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814787449] [2021-01-06 17:01:39,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164107360] [2021-01-06 17:01:39,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:39,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:39,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:39,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:39,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:39,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:39,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148639266] [2021-01-06 17:01:39,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:39,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:39,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:39,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:39,306 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:39,466 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:39,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:39,468 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:39,468 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:39,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2021-01-06 17:01:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:39,501 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:39,501 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:39,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:39,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:39,502 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:39,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:39,703 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1935393200, now seen corresponding path program 150 times [2021-01-06 17:01:39,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:39,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798027244] [2021-01-06 17:01:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:39,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798027244] [2021-01-06 17:01:39,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539529648] [2021-01-06 17:01:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:39,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:39,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:39,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:39,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:39,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233724182] [2021-01-06 17:01:39,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:39,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:39,991 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:01:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:40,145 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:40,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:40,147 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:40,147 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:40,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:01:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:40,184 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:40,184 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:40,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:40,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:40,184 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:40,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-01-06 17:01:40,385 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1933546158, now seen corresponding path program 151 times [2021-01-06 17:01:40,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:40,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419932264] [2021-01-06 17:01:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:40,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419932264] [2021-01-06 17:01:40,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435155338] [2021-01-06 17:01:40,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:40,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:40,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:40,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:40,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152008098] [2021-01-06 17:01:40,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:40,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:40,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:40,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:40,665 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:40,830 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:40,830 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:40,831 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:40,831 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:40,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 17:01:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:40,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:40,867 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:40,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:40,867 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:40,867 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:41,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:41,068 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash 160385838, now seen corresponding path program 152 times [2021-01-06 17:01:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:41,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913087251] [2021-01-06 17:01:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913087251] [2021-01-06 17:01:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011844879] [2021-01-06 17:01:41,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:41,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:41,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:41,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:41,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:41,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:41,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317244600] [2021-01-06 17:01:41,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:41,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:41,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:41,339 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:41,499 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:41,499 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:41,500 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:41,505 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:41,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-01-06 17:01:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:41,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:41,543 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:41,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:41,543 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:41,543 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:41,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:41,744 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash 158538796, now seen corresponding path program 153 times [2021-01-06 17:01:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:41,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284576859] [2021-01-06 17:01:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:41,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284576859] [2021-01-06 17:01:41,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553061702] [2021-01-06 17:01:41,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:41,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:41,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:41,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:41,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:42,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:42,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:42,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369099149] [2021-01-06 17:01:42,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:42,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:42,033 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:42,182 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:42,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:42,184 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:42,184 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:42,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2021-01-06 17:01:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:01:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:01:42,214 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 20 [2021-01-06 17:01:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:42,214 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:01:42,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:01:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:42,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:42,215 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:42,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-01-06 17:01:42,415 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1914386992, now seen corresponding path program 154 times [2021-01-06 17:01:42,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534384742] [2021-01-06 17:01:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534384742] [2021-01-06 17:01:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545317969] [2021-01-06 17:01:42,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:42,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:42,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:42,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:42,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:42,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878522450] [2021-01-06 17:01:42,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:42,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:42,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:42,701 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 20 states. [2021-01-06 17:01:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:43,395 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:01:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:01:43,395 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:43,396 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:01:43,396 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:01:43,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:01:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:01:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2021-01-06 17:01:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:43,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:43,435 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:43,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:43,436 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:43,436 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:43,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-01-06 17:01:43,637 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1912539950, now seen corresponding path program 155 times [2021-01-06 17:01:43,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:43,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076546595] [2021-01-06 17:01:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:43,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076546595] [2021-01-06 17:01:43,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776907456] [2021-01-06 17:01:43,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:43,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:43,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:43,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:43,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:43,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:43,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58563841] [2021-01-06 17:01:43,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:43,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:43,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:43,926 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:44,100 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:44,101 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:44,101 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:44,101 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:44,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-01-06 17:01:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:44,139 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:44,139 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:44,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:44,139 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:44,139 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:44,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-01-06 17:01:44,340 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 139379630, now seen corresponding path program 156 times [2021-01-06 17:01:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:44,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955083994] [2021-01-06 17:01:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:44,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955083994] [2021-01-06 17:01:44,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700778142] [2021-01-06 17:01:44,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:44,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:44,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:44,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:44,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:44,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:44,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565458302] [2021-01-06 17:01:44,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:44,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:44,634 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:44,810 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:01:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:44,811 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:44,811 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:01:44,811 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:01:44,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:01:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:01:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:44,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:44,849 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:44,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:44,850 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:44,850 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:45,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:45,051 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash 137532588, now seen corresponding path program 157 times [2021-01-06 17:01:45,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:45,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577433354] [2021-01-06 17:01:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:45,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577433354] [2021-01-06 17:01:45,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604153648] [2021-01-06 17:01:45,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:45,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:45,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:45,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550272628] [2021-01-06 17:01:45,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:45,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:45,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:45,339 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:45,492 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:01:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:45,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:45,493 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:01:45,493 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:01:45,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:01:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2021-01-06 17:01:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:45,532 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:45,532 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:45,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:45,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:45,533 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:45,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-01-06 17:01:45,747 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1234328622, now seen corresponding path program 158 times [2021-01-06 17:01:45,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:45,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881073019] [2021-01-06 17:01:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:45,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881073019] [2021-01-06 17:01:45,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287033281] [2021-01-06 17:01:45,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:45,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:45,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:46,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:46,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:46,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334444304] [2021-01-06 17:01:46,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:46,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:46,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:46,033 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:01:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:46,191 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:46,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:46,193 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:46,193 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:46,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:01:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:46,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:46,232 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:46,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:46,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:46,232 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:46,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:46,448 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1232481580, now seen corresponding path program 159 times [2021-01-06 17:01:46,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:46,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896204503] [2021-01-06 17:01:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:46,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896204503] [2021-01-06 17:01:46,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744948148] [2021-01-06 17:01:46,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:46,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:46,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:46,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:46,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:46,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319458939] [2021-01-06 17:01:46,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:46,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:46,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:46,748 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:46,909 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:46,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:46,911 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:46,911 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:46,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 17:01:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:46,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:46,949 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:46,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:46,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:46,949 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:47,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:47,152 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash -540678740, now seen corresponding path program 160 times [2021-01-06 17:01:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:47,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36866132] [2021-01-06 17:01:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:47,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36866132] [2021-01-06 17:01:47,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746037702] [2021-01-06 17:01:47,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:47,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:47,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:47,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:47,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:47,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777493272] [2021-01-06 17:01:47,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:47,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:47,440 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:01:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:48,126 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-01-06 17:01:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:01:48,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:48,127 INFO L225 Difference]: With dead ends: 51 [2021-01-06 17:01:48,127 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:01:48,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:01:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:01:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-01-06 17:01:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:48,170 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:48,170 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:48,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:48,170 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:48,170 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:48,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:48,372 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:48,372 INFO L82 PathProgramCache]: Analyzing trace with hash -542525782, now seen corresponding path program 161 times [2021-01-06 17:01:48,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:48,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277882686] [2021-01-06 17:01:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:48,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277882686] [2021-01-06 17:01:48,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284828493] [2021-01-06 17:01:48,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:48,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:48,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:48,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:48,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:48,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:48,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339368246] [2021-01-06 17:01:48,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:48,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:48,660 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:48,814 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:48,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:48,815 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:48,815 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:48,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2021-01-06 17:01:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:01:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:01:48,843 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 20 [2021-01-06 17:01:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:48,843 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:01:48,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:01:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:48,843 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:48,843 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:49,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:49,044 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1092709712, now seen corresponding path program 162 times [2021-01-06 17:01:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:49,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125367153] [2021-01-06 17:01:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125367153] [2021-01-06 17:01:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954181627] [2021-01-06 17:01:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:49,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:49,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:49,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:49,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837048764] [2021-01-06 17:01:49,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:49,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:49,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:49,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:49,343 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 19 states. [2021-01-06 17:01:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:49,477 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:49,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:49,478 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:49,478 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:49,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-01-06 17:01:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:49,519 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:49,519 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:49,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:49,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:49,520 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:49,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-01-06 17:01:49,720 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1094556754, now seen corresponding path program 163 times [2021-01-06 17:01:49,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:49,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580778510] [2021-01-06 17:01:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:49,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580778510] [2021-01-06 17:01:49,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832294706] [2021-01-06 17:01:49,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:49,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:50,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:50,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:50,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750222102] [2021-01-06 17:01:50,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:50,002 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:50,148 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:50,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:50,150 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:50,150 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:50,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 17:01:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:50,188 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:50,189 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:50,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:50,189 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:50,189 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:50,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-01-06 17:01:50,390 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1427250222, now seen corresponding path program 164 times [2021-01-06 17:01:50,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:50,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010892171] [2021-01-06 17:01:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010892171] [2021-01-06 17:01:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337608287] [2021-01-06 17:01:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:50,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:50,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:50,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:50,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:50,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518853817] [2021-01-06 17:01:50,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:50,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:50,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:50,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:50,683 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:50,818 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:50,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:50,820 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:50,820 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:50,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:50,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2021-01-06 17:01:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:50,860 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:50,860 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:50,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:50,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:50,860 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:51,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-01-06 17:01:51,061 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1425403180, now seen corresponding path program 165 times [2021-01-06 17:01:51,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:51,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857206687] [2021-01-06 17:01:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:51,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857206687] [2021-01-06 17:01:51,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975409141] [2021-01-06 17:01:51,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:51,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:51,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:51,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:51,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:51,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:51,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549919250] [2021-01-06 17:01:51,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:51,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:51,358 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:51,492 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:51,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:51,493 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:51,493 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:51,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:01:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:51,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:51,529 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:51,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:51,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:51,530 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:51,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-01-06 17:01:51,744 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1772768082, now seen corresponding path program 166 times [2021-01-06 17:01:51,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:51,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834370586] [2021-01-06 17:01:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:51,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834370586] [2021-01-06 17:01:51,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054058964] [2021-01-06 17:01:51,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:51,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:51,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:51,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:51,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:52,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:52,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:52,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041632691] [2021-01-06 17:01:52,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:52,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:52,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:52,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:52,029 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 20 states. [2021-01-06 17:01:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:52,723 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:01:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:01:52,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:52,724 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:01:52,724 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:01:52,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:01:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:01:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:01:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:52,765 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:52,765 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:52,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:52,765 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:52,765 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:52,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:52,966 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1774615124, now seen corresponding path program 167 times [2021-01-06 17:01:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:52,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141540194] [2021-01-06 17:01:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:53,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141540194] [2021-01-06 17:01:53,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541496363] [2021-01-06 17:01:53,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:53,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:53,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:53,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:53,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:53,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834257817] [2021-01-06 17:01:53,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:53,262 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:53,429 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:01:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:53,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:53,431 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:01:53,431 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:01:53,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:01:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 17:01:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:53,474 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:53,475 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:53,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:53,475 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:53,475 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:53,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:53,676 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash 747191852, now seen corresponding path program 168 times [2021-01-06 17:01:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:53,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921725447] [2021-01-06 17:01:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:53,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921725447] [2021-01-06 17:01:53,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634137496] [2021-01-06 17:01:53,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:53,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:53,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:53,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:53,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:53,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:53,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104862694] [2021-01-06 17:01:53,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:53,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:53,971 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:01:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:54,132 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:01:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:54,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:54,134 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:01:54,134 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:01:54,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:01:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2021-01-06 17:01:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:54,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:54,174 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:54,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:54,174 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:54,174 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:54,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:54,375 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:54,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 745344810, now seen corresponding path program 169 times [2021-01-06 17:01:54,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:54,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014457708] [2021-01-06 17:01:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014457708] [2021-01-06 17:01:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295959770] [2021-01-06 17:01:54,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:54,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:54,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:54,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262052087] [2021-01-06 17:01:54,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:54,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:54,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:54,663 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:54,825 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:54,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:54,826 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:54,826 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:54,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-01-06 17:01:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:01:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:01:54,859 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 20 [2021-01-06 17:01:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:54,859 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:01:54,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:01:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:54,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:54,859 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:55,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-01-06 17:01:55,060 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1793774290, now seen corresponding path program 170 times [2021-01-06 17:01:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:55,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962838965] [2021-01-06 17:01:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:55,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962838965] [2021-01-06 17:01:55,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257708242] [2021-01-06 17:01:55,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:55,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:55,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:55,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:55,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:55,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120566478] [2021-01-06 17:01:55,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:55,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:55,348 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 19 states. [2021-01-06 17:01:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:55,504 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:01:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:55,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:55,505 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:01:55,505 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:01:55,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:01:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-01-06 17:01:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:55,547 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:55,547 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:55,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:55,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:55,548 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:55,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:55,753 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1795621332, now seen corresponding path program 171 times [2021-01-06 17:01:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:55,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815076988] [2021-01-06 17:01:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:55,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815076988] [2021-01-06 17:01:55,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563574592] [2021-01-06 17:01:55,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:55,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:55,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:56,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:56,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867297073] [2021-01-06 17:01:56,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:56,005 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:56,145 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:56,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:56,146 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:56,146 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:56,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-01-06 17:01:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:56,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:56,192 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:56,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:56,192 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:56,192 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:56,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:56,407 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 726185644, now seen corresponding path program 172 times [2021-01-06 17:01:56,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:56,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384010193] [2021-01-06 17:01:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:56,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384010193] [2021-01-06 17:01:56,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989786593] [2021-01-06 17:01:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:56,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:56,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:01:56,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:56,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:56,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:01:56,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204325690] [2021-01-06 17:01:56,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:01:56,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:01:56,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:01:56,664 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:01:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:57,326 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2021-01-06 17:01:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:01:57,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:01:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:57,328 INFO L225 Difference]: With dead ends: 47 [2021-01-06 17:01:57,328 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 17:01:57,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:01:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 17:01:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-01-06 17:01:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:57,370 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:57,370 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:57,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:01:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:57,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:57,371 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:57,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:57,584 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 724338602, now seen corresponding path program 173 times [2021-01-06 17:01:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:57,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875258084] [2021-01-06 17:01:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:57,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875258084] [2021-01-06 17:01:57,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591029348] [2021-01-06 17:01:57,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:57,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:57,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:57,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:57,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:57,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:57,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459006747] [2021-01-06 17:01:57,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:57,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:57,875 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:58,027 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:01:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:58,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:58,029 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:01:58,029 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:01:58,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:01:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2021-01-06 17:01:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:01:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:01:58,071 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:01:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:58,071 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:01:58,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:01:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:58,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:58,071 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:58,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:58,272 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1821134636, now seen corresponding path program 174 times [2021-01-06 17:01:58,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:58,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403922255] [2021-01-06 17:01:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403922255] [2021-01-06 17:01:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290471589] [2021-01-06 17:01:58,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:58,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:58,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:58,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:58,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:58,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:58,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675547399] [2021-01-06 17:01:58,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:58,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:58,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:58,563 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:01:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:58,699 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:01:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:58,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:58,700 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:01:58,701 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:01:58,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:01:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-01-06 17:01:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:01:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:01:58,761 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:01:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:58,762 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:01:58,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:01:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:58,762 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:58,762 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:58,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-01-06 17:01:58,963 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:58,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1819287594, now seen corresponding path program 175 times [2021-01-06 17:01:58,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:58,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325856765] [2021-01-06 17:01:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:59,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325856765] [2021-01-06 17:01:59,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4456480] [2021-01-06 17:01:59,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:59,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:59,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:59,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:59,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404375368] [2021-01-06 17:01:59,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:59,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:59,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:59,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:59,216 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:01:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:59,359 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:01:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:01:59,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:01:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:59,361 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:01:59,361 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:01:59,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:01:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-01-06 17:01:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:01:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:01:59,402 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:01:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:59,402 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:01:59,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:01:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:01:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:01:59,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:59,402 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:59,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:59,603 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:59,604 INFO L82 PathProgramCache]: Analyzing trace with hash 46127274, now seen corresponding path program 176 times [2021-01-06 17:01:59,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:59,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857816013] [2021-01-06 17:01:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:59,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857816013] [2021-01-06 17:01:59,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721102012] [2021-01-06 17:01:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:59,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:59,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:59,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:01:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:59,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:59,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:01:59,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569665678] [2021-01-06 17:01:59,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:01:59,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:01:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:01:59,895 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:02:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:00,034 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 17:02:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:00,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:00,035 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:02:00,035 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:02:00,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:02:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 17:02:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:00,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:00,077 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:00,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:00,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:00,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:00,077 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:00,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-01-06 17:02:00,280 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash 44280232, now seen corresponding path program 177 times [2021-01-06 17:02:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:00,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161879037] [2021-01-06 17:02:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:00,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161879037] [2021-01-06 17:02:00,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239875868] [2021-01-06 17:02:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:00,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:00,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:00,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:00,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:00,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:00,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520259172] [2021-01-06 17:02:00,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:00,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:00,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:00,576 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:00,701 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2021-01-06 17:02:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:00,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:00,702 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:02:00,702 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:02:00,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:02:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-01-06 17:02:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:02:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:02:00,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 20 [2021-01-06 17:02:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:00,731 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:02:00,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:02:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:00,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:00,732 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:00,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:00,943 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:00,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1371031502, now seen corresponding path program 178 times [2021-01-06 17:02:00,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:00,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21933149] [2021-01-06 17:02:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:01,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21933149] [2021-01-06 17:02:01,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967450993] [2021-01-06 17:02:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:01,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:01,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:01,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:01,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:01,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194469643] [2021-01-06 17:02:01,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:01,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:01,198 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 20 states. [2021-01-06 17:02:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:01,915 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2021-01-06 17:02:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:01,916 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:01,917 INFO L225 Difference]: With dead ends: 82 [2021-01-06 17:02:01,917 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:02:01,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:02:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 35. [2021-01-06 17:02:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:01,971 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:01,971 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:01,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:01,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:01,971 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:02,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:02,172 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:02,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:02,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1372878544, now seen corresponding path program 179 times [2021-01-06 17:02:02,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:02,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375484547] [2021-01-06 17:02:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:02,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375484547] [2021-01-06 17:02:02,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787145936] [2021-01-06 17:02:02,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:02,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:02,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:02,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:02,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:02,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:02,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967647725] [2021-01-06 17:02:02,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:02,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:02,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:02,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:02,467 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:02,672 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:02,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:02,674 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:02,674 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:02,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-01-06 17:02:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:02,727 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:02,727 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:02,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:02,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:02,727 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:02,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-01-06 17:02:02,937 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1148928432, now seen corresponding path program 180 times [2021-01-06 17:02:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:02,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511055191] [2021-01-06 17:02:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:03,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511055191] [2021-01-06 17:02:03,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872964876] [2021-01-06 17:02:03,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:03,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:03,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:03,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:03,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573863291] [2021-01-06 17:02:03,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:03,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:03,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:03,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:03,231 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:03,431 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:02:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:03,432 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:03,432 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:02:03,432 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:02:03,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:02:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2021-01-06 17:02:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:03,484 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:03,484 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:03,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:03,484 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:03,484 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:03,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:03,685 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:03,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1147081390, now seen corresponding path program 181 times [2021-01-06 17:02:03,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:03,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015981088] [2021-01-06 17:02:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:03,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015981088] [2021-01-06 17:02:03,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829328895] [2021-01-06 17:02:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:03,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:03,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:03,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:03,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776643384] [2021-01-06 17:02:03,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:03,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:03,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:03,973 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:04,157 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:04,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:04,158 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:04,158 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:04,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 31. [2021-01-06 17:02:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:04,203 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:04,204 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:04,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:04,204 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:04,204 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:04,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:04,412 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2051089872, now seen corresponding path program 182 times [2021-01-06 17:02:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:04,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283144249] [2021-01-06 17:02:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:04,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283144249] [2021-01-06 17:02:04,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208318220] [2021-01-06 17:02:04,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:04,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:04,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:04,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:04,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:04,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:04,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:04,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221021427] [2021-01-06 17:02:04,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:04,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:04,707 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:02:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:04,911 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:04,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:04,912 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:04,912 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:04,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2021-01-06 17:02:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:04,976 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:04,976 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:04,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:04,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:04,977 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:05,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:05,178 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:05,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2052936914, now seen corresponding path program 183 times [2021-01-06 17:02:05,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:05,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520105748] [2021-01-06 17:02:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520105748] [2021-01-06 17:02:05,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281038559] [2021-01-06 17:02:05,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:05,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:05,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:05,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:05,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:05,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011357653] [2021-01-06 17:02:05,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:05,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:05,473 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:05,685 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:05,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:05,687 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:05,687 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:05,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-01-06 17:02:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:05,736 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:05,737 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:05,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:05,737 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:05,737 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:05,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-01-06 17:02:05,938 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash 468870062, now seen corresponding path program 184 times [2021-01-06 17:02:05,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:05,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231045264] [2021-01-06 17:02:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:06,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231045264] [2021-01-06 17:02:06,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613183988] [2021-01-06 17:02:06,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:06,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:06,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:06,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:06,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:06,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:06,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944207331] [2021-01-06 17:02:06,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:06,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:06,224 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 20 states. [2021-01-06 17:02:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:06,948 INFO L93 Difference]: Finished difference Result 72 states and 102 transitions. [2021-01-06 17:02:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:06,949 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:06,950 INFO L225 Difference]: With dead ends: 72 [2021-01-06 17:02:06,950 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 17:02:06,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 17:02:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 35. [2021-01-06 17:02:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:07,005 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:07,006 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:07,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:07,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:07,006 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:07,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:07,207 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash 467023020, now seen corresponding path program 185 times [2021-01-06 17:02:07,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:07,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412294971] [2021-01-06 17:02:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:07,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412294971] [2021-01-06 17:02:07,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291035306] [2021-01-06 17:02:07,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:07,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:07,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:07,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:07,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:07,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191819665] [2021-01-06 17:02:07,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:07,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:07,502 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:07,685 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:07,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:07,686 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:07,686 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:07,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 29. [2021-01-06 17:02:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:02:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:02:07,727 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:02:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:07,728 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:02:07,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:02:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:07,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:07,728 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:07,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:07,943 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:07,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:07,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2072096080, now seen corresponding path program 186 times [2021-01-06 17:02:07,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:07,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515276498] [2021-01-06 17:02:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:08,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515276498] [2021-01-06 17:02:08,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621512337] [2021-01-06 17:02:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:08,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:08,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:08,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:08,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:08,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378612589] [2021-01-06 17:02:08,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:08,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:08,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:08,222 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:02:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:08,434 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:08,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:08,435 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:08,435 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:08,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:02:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:08,487 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:08,487 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:08,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:08,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:08,487 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:08,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-01-06 17:02:08,688 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2073943122, now seen corresponding path program 187 times [2021-01-06 17:02:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:08,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912623312] [2021-01-06 17:02:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:08,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912623312] [2021-01-06 17:02:08,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683749696] [2021-01-06 17:02:08,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:08,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:08,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:08,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845139406] [2021-01-06 17:02:08,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:08,968 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:09,151 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:02:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:09,151 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:09,152 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:02:09,152 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:02:09,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:02:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-01-06 17:02:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:09,205 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:09,205 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:09,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:09,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:09,206 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:09,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-01-06 17:02:09,421 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash 447863854, now seen corresponding path program 188 times [2021-01-06 17:02:09,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:09,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733789963] [2021-01-06 17:02:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:09,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733789963] [2021-01-06 17:02:09,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80487781] [2021-01-06 17:02:09,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:09,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:09,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:09,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:09,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:09,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062353246] [2021-01-06 17:02:09,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:09,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:09,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:09,713 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:09,915 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:09,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:09,916 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:09,917 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:09,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:02:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:09,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:09,968 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:09,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:09,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:09,968 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:10,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-01-06 17:02:10,169 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash 446016812, now seen corresponding path program 189 times [2021-01-06 17:02:10,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:10,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246861999] [2021-01-06 17:02:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246861999] [2021-01-06 17:02:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572189255] [2021-01-06 17:02:10,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:10,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:10,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:10,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:10,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:10,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934964994] [2021-01-06 17:02:10,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:10,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:10,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:10,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:10,465 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:10,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:10,645 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:02:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:10,646 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:10,646 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:02:10,646 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:02:10,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:02:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-01-06 17:02:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:10,692 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:10,692 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:10,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:10,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:10,692 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:10,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:10,894 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:10,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:10,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1542812846, now seen corresponding path program 190 times [2021-01-06 17:02:10,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:10,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047980520] [2021-01-06 17:02:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:10,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047980520] [2021-01-06 17:02:10,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521440087] [2021-01-06 17:02:10,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-01-06 17:02:11,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:11,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:11,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:11,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:11,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833329230] [2021-01-06 17:02:11,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:11,161 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:02:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:11,898 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-01-06 17:02:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:11,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:11,899 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:02:11,899 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:02:11,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:02:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2021-01-06 17:02:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:11,967 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:11,967 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:11,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:11,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:11,968 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:12,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-01-06 17:02:12,169 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1540965804, now seen corresponding path program 191 times [2021-01-06 17:02:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:12,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400833852] [2021-01-06 17:02:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:12,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400833852] [2021-01-06 17:02:12,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638513176] [2021-01-06 17:02:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:12,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:12,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:12,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:12,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240390377] [2021-01-06 17:02:12,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:12,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:12,451 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:12,644 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:02:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:12,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:12,645 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:02:12,645 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:02:12,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:02:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:02:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:12,719 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:12,720 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:12,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:12,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:12,720 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:12,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:12,936 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:12,936 INFO L82 PathProgramCache]: Analyzing trace with hash -232194516, now seen corresponding path program 192 times [2021-01-06 17:02:12,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:12,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296199275] [2021-01-06 17:02:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296199275] [2021-01-06 17:02:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509447613] [2021-01-06 17:02:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:13,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:13,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:13,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:13,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:13,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:13,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:13,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553548528] [2021-01-06 17:02:13,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:13,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:13,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:13,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:13,228 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:13,415 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:02:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:13,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:13,417 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:02:13,417 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:02:13,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:02:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-01-06 17:02:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:13,474 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:13,475 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:13,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:13,475 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:13,475 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:13,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-01-06 17:02:13,676 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash -234041558, now seen corresponding path program 193 times [2021-01-06 17:02:13,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901763025] [2021-01-06 17:02:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:13,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901763025] [2021-01-06 17:02:13,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851768249] [2021-01-06 17:02:13,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:13,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:13,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:13,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:13,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825455133] [2021-01-06 17:02:13,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:13,960 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:14,123 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:02:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:14,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:14,125 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:02:14,125 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:02:14,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:02:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 27. [2021-01-06 17:02:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:02:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:02:14,182 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 20 [2021-01-06 17:02:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:14,182 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:02:14,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:02:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:14,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:14,183 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:14,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-01-06 17:02:14,396 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -784225488, now seen corresponding path program 194 times [2021-01-06 17:02:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:14,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794226262] [2021-01-06 17:02:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:14,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794226262] [2021-01-06 17:02:14,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216178098] [2021-01-06 17:02:14,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:14,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:14,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:14,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:14,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001685846] [2021-01-06 17:02:14,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:14,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:14,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:14,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:14,683 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 19 states. [2021-01-06 17:02:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:14,881 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:14,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:14,882 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:14,882 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:14,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2021-01-06 17:02:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:14,934 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:14,935 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:14,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:14,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:14,935 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:15,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:15,136 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -786072530, now seen corresponding path program 195 times [2021-01-06 17:02:15,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:15,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835262742] [2021-01-06 17:02:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:15,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835262742] [2021-01-06 17:02:15,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656403954] [2021-01-06 17:02:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:15,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:15,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:15,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:15,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:15,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:15,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682816440] [2021-01-06 17:02:15,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:15,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:15,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:15,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:15,420 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:15,657 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:15,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:15,658 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:15,658 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:15,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-01-06 17:02:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:15,710 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:15,711 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:15,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:15,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:15,711 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:15,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-01-06 17:02:15,925 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1735734446, now seen corresponding path program 196 times [2021-01-06 17:02:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565212360] [2021-01-06 17:02:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:16,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565212360] [2021-01-06 17:02:16,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540612259] [2021-01-06 17:02:16,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:16,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:16,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:16,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:16,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:16,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:16,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076762321] [2021-01-06 17:02:16,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:16,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:16,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:16,211 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 20 states. [2021-01-06 17:02:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:16,992 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-01-06 17:02:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:16,992 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:16,993 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:02:16,993 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:02:16,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:02:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2021-01-06 17:02:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:17,051 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:17,052 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:17,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:17,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:17,052 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:17,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-01-06 17:02:17,253 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1733887404, now seen corresponding path program 197 times [2021-01-06 17:02:17,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:17,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537727749] [2021-01-06 17:02:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:17,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537727749] [2021-01-06 17:02:17,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062577709] [2021-01-06 17:02:17,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:17,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:17,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:17,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:17,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:17,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050434927] [2021-01-06 17:02:17,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:17,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:17,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:17,547 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:17,757 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:17,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:17,759 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:17,759 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:17,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 31. [2021-01-06 17:02:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:17,808 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:17,808 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:17,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:17,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:17,808 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:18,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:18,009 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1464283858, now seen corresponding path program 198 times [2021-01-06 17:02:18,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:18,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975473862] [2021-01-06 17:02:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:18,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975473862] [2021-01-06 17:02:18,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943885149] [2021-01-06 17:02:18,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:18,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:18,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:18,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:18,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:18,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:18,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775812260] [2021-01-06 17:02:18,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:18,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:18,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:18,304 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:02:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:18,739 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:18,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:18,741 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:18,741 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:18,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2021-01-06 17:02:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:18,829 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:18,829 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:18,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:18,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:18,829 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:19,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-01-06 17:02:19,045 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1466130900, now seen corresponding path program 199 times [2021-01-06 17:02:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:19,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954813398] [2021-01-06 17:02:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:19,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954813398] [2021-01-06 17:02:19,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617019966] [2021-01-06 17:02:19,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:19,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:19,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822861856] [2021-01-06 17:02:19,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:19,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:19,331 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:19,547 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:19,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:19,549 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:19,549 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:19,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-01-06 17:02:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:19,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:19,602 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:19,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:19,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:19,603 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:19,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:19,803 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:19,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1055676076, now seen corresponding path program 200 times [2021-01-06 17:02:19,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:19,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10433220] [2021-01-06 17:02:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:19,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10433220] [2021-01-06 17:02:19,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892754433] [2021-01-06 17:02:19,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:19,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:19,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:19,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:20,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:20,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:20,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104532521] [2021-01-06 17:02:20,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:20,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:20,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:20,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:20,092 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:20,306 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:02:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:20,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:20,308 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:02:20,308 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:02:20,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:02:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2021-01-06 17:02:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:20,363 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:20,363 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:20,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:20,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:20,363 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:20,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-01-06 17:02:20,564 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:20,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1053829034, now seen corresponding path program 201 times [2021-01-06 17:02:20,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:20,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192763312] [2021-01-06 17:02:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:20,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192763312] [2021-01-06 17:02:20,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052662682] [2021-01-06 17:02:20,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:20,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:20,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:20,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227179326] [2021-01-06 17:02:20,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:20,864 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:21,051 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:21,052 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:21,052 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:21,053 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:21,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 29. [2021-01-06 17:02:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:02:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:02:21,097 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:02:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:21,097 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:02:21,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:02:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:21,097 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:21,097 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:21,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:21,298 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1485290066, now seen corresponding path program 202 times [2021-01-06 17:02:21,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:21,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184464635] [2021-01-06 17:02:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:21,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184464635] [2021-01-06 17:02:21,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623368598] [2021-01-06 17:02:21,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:21,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:21,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:21,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:21,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:21,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:21,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:21,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672919050] [2021-01-06 17:02:21,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:21,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:21,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:21,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:21,589 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 20 states. [2021-01-06 17:02:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:22,366 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:22,367 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:22,367 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:22,368 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:22,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2021-01-06 17:02:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:22,424 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:22,425 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:22,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:22,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:22,425 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:22,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-01-06 17:02:22,626 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:22,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:22,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1487137108, now seen corresponding path program 203 times [2021-01-06 17:02:22,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:22,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378841813] [2021-01-06 17:02:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378841813] [2021-01-06 17:02:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207054731] [2021-01-06 17:02:22,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:22,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:22,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:22,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:22,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:22,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:22,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712508603] [2021-01-06 17:02:22,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:22,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:22,921 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:23,115 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:02:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:23,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:23,117 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:02:23,117 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:02:23,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:02:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-01-06 17:02:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:23,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:23,172 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:23,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:23,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:23,172 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:23,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-01-06 17:02:23,373 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1034669868, now seen corresponding path program 204 times [2021-01-06 17:02:23,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:23,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75225107] [2021-01-06 17:02:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:23,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75225107] [2021-01-06 17:02:23,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213281578] [2021-01-06 17:02:23,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:23,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:23,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:23,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:23,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:23,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606324479] [2021-01-06 17:02:23,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:23,670 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:23,881 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:23,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:23,882 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:23,882 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:23,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:02:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:23,938 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:23,938 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:23,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:23,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:23,938 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:24,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:24,139 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1032822826, now seen corresponding path program 205 times [2021-01-06 17:02:24,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:24,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835324477] [2021-01-06 17:02:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:24,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835324477] [2021-01-06 17:02:24,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924115207] [2021-01-06 17:02:24,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:24,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:24,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:24,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:24,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:24,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45457598] [2021-01-06 17:02:24,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:24,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:24,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:24,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:24,429 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:24,631 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:02:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:24,632 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:24,632 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:02:24,632 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:02:24,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:02:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-01-06 17:02:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:24,682 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:24,682 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:24,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:24,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:24,683 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:24,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-01-06 17:02:24,883 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2129618860, now seen corresponding path program 206 times [2021-01-06 17:02:24,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:24,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728252559] [2021-01-06 17:02:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:24,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728252559] [2021-01-06 17:02:24,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049089778] [2021-01-06 17:02:24,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:25,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:25,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:25,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:25,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:25,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161273186] [2021-01-06 17:02:25,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:25,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:25,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:25,177 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:02:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:25,370 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:02:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:25,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:25,371 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:02:25,371 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:02:25,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:02:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2021-01-06 17:02:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:25,430 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:25,430 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:25,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:25,430 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:25,430 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:25,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:25,631 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2127771818, now seen corresponding path program 207 times [2021-01-06 17:02:25,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:25,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979659130] [2021-01-06 17:02:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:25,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979659130] [2021-01-06 17:02:25,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006724856] [2021-01-06 17:02:25,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:25,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:25,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:25,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:25,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:25,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551927097] [2021-01-06 17:02:25,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:25,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:25,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:25,926 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:26,103 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:02:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:26,104 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:26,104 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:02:26,104 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:02:26,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:02:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:02:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:26,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:26,181 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:26,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:26,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:26,181 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:26,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:26,382 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash 354611498, now seen corresponding path program 208 times [2021-01-06 17:02:26,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:26,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585231829] [2021-01-06 17:02:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:26,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585231829] [2021-01-06 17:02:26,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157800974] [2021-01-06 17:02:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:26,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:26,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:26,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:26,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:26,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:26,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660930208] [2021-01-06 17:02:26,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:26,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:26,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:26,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:26,673 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 20 states. [2021-01-06 17:02:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:27,438 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2021-01-06 17:02:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:27,439 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:27,439 INFO L225 Difference]: With dead ends: 55 [2021-01-06 17:02:27,439 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:02:27,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:02:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2021-01-06 17:02:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:27,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:27,496 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:27,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:27,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:27,496 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:27,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-01-06 17:02:27,697 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash 352764456, now seen corresponding path program 209 times [2021-01-06 17:02:27,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:27,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826894819] [2021-01-06 17:02:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826894819] [2021-01-06 17:02:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646768983] [2021-01-06 17:02:27,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:27,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:27,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:27,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:27,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:27,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351331603] [2021-01-06 17:02:27,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:27,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:27,991 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:28,171 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:02:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:28,172 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:28,173 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:02:28,173 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:02:28,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:02:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 25. [2021-01-06 17:02:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:02:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:02:28,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 20 [2021-01-06 17:02:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:28,210 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:02:28,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:02:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:28,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:28,210 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:28,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-01-06 17:02:28,411 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -91167824, now seen corresponding path program 210 times [2021-01-06 17:02:28,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:28,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468114742] [2021-01-06 17:02:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:28,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468114742] [2021-01-06 17:02:28,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785321429] [2021-01-06 17:02:28,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:28,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:28,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:28,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:28,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993490961] [2021-01-06 17:02:28,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:28,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:28,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:28,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:28,691 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 19 states. [2021-01-06 17:02:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:28,898 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:02:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:28,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:28,899 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:02:28,899 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:02:28,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:02:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:02:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:28,960 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:28,960 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:28,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:28,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:28,961 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:29,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-01-06 17:02:29,162 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -93014866, now seen corresponding path program 211 times [2021-01-06 17:02:29,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:29,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781859941] [2021-01-06 17:02:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:29,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781859941] [2021-01-06 17:02:29,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259943406] [2021-01-06 17:02:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:29,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:29,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:29,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689338956] [2021-01-06 17:02:29,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:29,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:29,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:29,440 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:29,636 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:02:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:29,637 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:29,637 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:02:29,637 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:02:29,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:02:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:02:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:29,696 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:29,696 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:29,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:29,696 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:29,696 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:29,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:29,897 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:29,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1866175186, now seen corresponding path program 212 times [2021-01-06 17:02:29,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:29,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085887169] [2021-01-06 17:02:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:29,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085887169] [2021-01-06 17:02:29,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007310642] [2021-01-06 17:02:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:30,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:30,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:30,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:30,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:30,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:30,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239941620] [2021-01-06 17:02:30,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:30,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:30,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:30,176 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:30,374 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:02:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:30,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:30,375 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:02:30,375 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:02:30,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:02:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:02:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:30,446 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:30,447 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:30,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:30,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:30,447 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:30,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-01-06 17:02:30,648 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:30,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1868022228, now seen corresponding path program 213 times [2021-01-06 17:02:30,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:30,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973382195] [2021-01-06 17:02:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:30,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973382195] [2021-01-06 17:02:30,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676750478] [2021-01-06 17:02:30,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:30,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:30,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:30,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:30,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:30,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263576248] [2021-01-06 17:02:30,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:30,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:30,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:30,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:30,939 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:31,157 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:02:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:31,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:31,158 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:02:31,158 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:02:31,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:02:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2021-01-06 17:02:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:31,215 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:31,215 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:31,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:31,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:31,215 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:31,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:31,416 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash -771226194, now seen corresponding path program 214 times [2021-01-06 17:02:31,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:31,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717031921] [2021-01-06 17:02:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:31,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717031921] [2021-01-06 17:02:31,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547202548] [2021-01-06 17:02:31,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:31,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:31,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:31,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:31,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:31,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:31,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559542266] [2021-01-06 17:02:31,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:31,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:31,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:31,693 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:02:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:32,407 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:32,408 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:32,408 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:32,408 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:32,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2021-01-06 17:02:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:32,469 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:32,469 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:32,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:32,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:32,469 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:32,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:32,670 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash -773073236, now seen corresponding path program 215 times [2021-01-06 17:02:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:32,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020201443] [2021-01-06 17:02:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:32,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020201443] [2021-01-06 17:02:32,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034798639] [2021-01-06 17:02:32,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:32,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:32,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:32,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:32,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224728316] [2021-01-06 17:02:32,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:32,956 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:33,222 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:02:33,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:33,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:33,224 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:02:33,224 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:02:33,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:02:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2021-01-06 17:02:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:33,328 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:33,328 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:33,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:33,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:33,329 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:33,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:33,543 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1748733740, now seen corresponding path program 216 times [2021-01-06 17:02:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:33,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600065657] [2021-01-06 17:02:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:33,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600065657] [2021-01-06 17:02:33,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379853461] [2021-01-06 17:02:33,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:33,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:33,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:33,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:33,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4661908] [2021-01-06 17:02:33,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:33,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:33,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:33,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:33,840 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:34,012 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:02:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:34,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:34,013 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:02:34,013 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:02:34,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:02:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2021-01-06 17:02:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:34,079 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:34,079 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:34,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:34,079 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:34,080 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:34,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:34,280 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1746886698, now seen corresponding path program 217 times [2021-01-06 17:02:34,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:34,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169625492] [2021-01-06 17:02:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:34,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169625492] [2021-01-06 17:02:34,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301705039] [2021-01-06 17:02:34,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:34,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:34,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:34,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:34,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:34,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814304364] [2021-01-06 17:02:34,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:34,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:34,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:34,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:34,552 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:34,740 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:02:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:34,743 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:34,744 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:02:34,744 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:02:34,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:02:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-01-06 17:02:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:02:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:02:34,795 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:02:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:34,795 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:02:34,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:02:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:34,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:34,796 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:34,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-01-06 17:02:34,996 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash -792232402, now seen corresponding path program 218 times [2021-01-06 17:02:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:34,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261797158] [2021-01-06 17:02:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261797158] [2021-01-06 17:02:35,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347613318] [2021-01-06 17:02:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:35,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:35,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:35,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:35,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584474905] [2021-01-06 17:02:35,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:35,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:35,272 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:02:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:35,467 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:02:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:35,468 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:35,469 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:02:35,469 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:02:35,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:02:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:02:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:35,530 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:35,531 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:35,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:35,531 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:35,531 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:35,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-01-06 17:02:35,732 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash -794079444, now seen corresponding path program 219 times [2021-01-06 17:02:35,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:35,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212654094] [2021-01-06 17:02:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212654094] [2021-01-06 17:02:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583423044] [2021-01-06 17:02:35,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:35,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:35,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:36,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:36,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:36,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431323271] [2021-01-06 17:02:36,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:36,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:36,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:36,009 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:36,217 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:02:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:36,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:36,219 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:02:36,219 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:02:36,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:02:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2021-01-06 17:02:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:36,278 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:36,278 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:36,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:36,278 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:36,279 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:36,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-01-06 17:02:36,479 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1727727532, now seen corresponding path program 220 times [2021-01-06 17:02:36,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:36,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13594625] [2021-01-06 17:02:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:36,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13594625] [2021-01-06 17:02:36,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502657550] [2021-01-06 17:02:36,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:36,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:36,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:36,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:36,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:36,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:36,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089043564] [2021-01-06 17:02:36,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:36,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:36,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:36,751 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 20 states. [2021-01-06 17:02:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:37,443 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2021-01-06 17:02:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:37,443 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:37,444 INFO L225 Difference]: With dead ends: 59 [2021-01-06 17:02:37,444 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 17:02:37,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 17:02:37,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-01-06 17:02:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:37,509 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:37,510 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:37,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:37,510 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:37,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:37,510 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:37,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-01-06 17:02:37,720 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:37,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1725880490, now seen corresponding path program 221 times [2021-01-06 17:02:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:37,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793777468] [2021-01-06 17:02:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:37,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793777468] [2021-01-06 17:02:37,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063834068] [2021-01-06 17:02:37,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:37,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:37,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:37,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:37,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:37,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:37,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:37,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000960176] [2021-01-06 17:02:37,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:37,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:37,996 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:38,202 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:02:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:38,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:38,204 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:02:38,204 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:02:38,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:02:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2021-01-06 17:02:38,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:38,259 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:38,260 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:38,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:38,260 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:38,260 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:38,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-01-06 17:02:38,461 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1472290772, now seen corresponding path program 222 times [2021-01-06 17:02:38,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:38,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034365048] [2021-01-06 17:02:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:38,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034365048] [2021-01-06 17:02:38,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700569399] [2021-01-06 17:02:38,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:38,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:38,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:38,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:38,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431035952] [2021-01-06 17:02:38,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:38,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:38,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:38,744 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:02:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:38,945 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:02:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:38,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:38,946 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:02:38,946 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:02:38,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:02:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-01-06 17:02:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:39,007 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:39,008 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:39,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:39,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:39,008 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:39,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:39,209 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1474137814, now seen corresponding path program 223 times [2021-01-06 17:02:39,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:39,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426264702] [2021-01-06 17:02:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:39,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426264702] [2021-01-06 17:02:39,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54369574] [2021-01-06 17:02:39,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:39,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:39,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:39,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:39,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997742390] [2021-01-06 17:02:39,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:39,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:39,507 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:39,771 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:02:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:39,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:39,772 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:02:39,772 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:02:39,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:02:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2021-01-06 17:02:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:39,835 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:39,836 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:39,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:39,838 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:39,838 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:40,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-01-06 17:02:40,051 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:40,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1047669162, now seen corresponding path program 224 times [2021-01-06 17:02:40,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:40,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183813317] [2021-01-06 17:02:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:40,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183813317] [2021-01-06 17:02:40,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579056446] [2021-01-06 17:02:40,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:40,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:40,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:40,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:40,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:40,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:40,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341084001] [2021-01-06 17:02:40,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:40,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:40,335 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:40,540 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:02:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:40,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:40,541 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:02:40,541 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:02:40,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:02:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2021-01-06 17:02:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:40,611 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:40,611 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:40,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:40,611 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:40,612 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:40,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:40,813 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1045822120, now seen corresponding path program 225 times [2021-01-06 17:02:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:40,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811062029] [2021-01-06 17:02:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:40,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811062029] [2021-01-06 17:02:40,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879715167] [2021-01-06 17:02:40,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:40,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:40,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:41,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:41,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:41,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106068841] [2021-01-06 17:02:41,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:41,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:41,094 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:41,282 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:02:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:41,282 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:41,283 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:02:41,283 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:02:41,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:41,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:02:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2021-01-06 17:02:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:02:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:02:41,328 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 20 [2021-01-06 17:02:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:41,328 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:02:41,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:02:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:41,328 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:41,328 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:41,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-01-06 17:02:41,529 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash 495638190, now seen corresponding path program 226 times [2021-01-06 17:02:41,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:41,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675713930] [2021-01-06 17:02:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675713930] [2021-01-06 17:02:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060379878] [2021-01-06 17:02:41,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:41,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:41,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:41,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:41,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:41,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609666729] [2021-01-06 17:02:41,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:41,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:41,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:41,808 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 20 states. [2021-01-06 17:02:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:42,555 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:02:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:42,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:42,556 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:02:42,556 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:02:42,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:02:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:02:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:42,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:42,620 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:42,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:42,620 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:42,620 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:42,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:42,821 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash 493791148, now seen corresponding path program 227 times [2021-01-06 17:02:42,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:42,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417373266] [2021-01-06 17:02:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:42,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417373266] [2021-01-06 17:02:42,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183578430] [2021-01-06 17:02:42,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:42,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:42,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:42,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:42,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:43,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:43,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:43,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105799090] [2021-01-06 17:02:43,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:43,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:43,102 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:43,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:43,302 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:02:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:43,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:43,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:43,304 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:02:43,304 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:02:43,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:02:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:02:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:43,365 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:43,365 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:43,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:43,366 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:43,366 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:43,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:43,579 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1279369172, now seen corresponding path program 228 times [2021-01-06 17:02:43,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:43,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846009825] [2021-01-06 17:02:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:43,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846009825] [2021-01-06 17:02:43,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305130954] [2021-01-06 17:02:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:43,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:43,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:43,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:43,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:43,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960342720] [2021-01-06 17:02:43,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:43,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:43,863 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:44,032 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:02:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:44,033 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:44,033 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:02:44,033 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:02:44,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:02:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-01-06 17:02:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:44,097 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:44,097 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:44,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:44,097 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:44,097 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:44,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:44,298 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:44,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:44,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1281216214, now seen corresponding path program 229 times [2021-01-06 17:02:44,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:44,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337154879] [2021-01-06 17:02:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:44,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337154879] [2021-01-06 17:02:44,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059896549] [2021-01-06 17:02:44,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:44,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:44,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:44,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358878050] [2021-01-06 17:02:44,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:44,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:44,575 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:44,764 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:02:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:44,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:44,765 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:02:44,766 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:02:44,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:02:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-01-06 17:02:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:44,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:44,824 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:44,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:44,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:44,825 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:45,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-01-06 17:02:45,026 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash -184420180, now seen corresponding path program 230 times [2021-01-06 17:02:45,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:45,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438982089] [2021-01-06 17:02:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:45,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438982089] [2021-01-06 17:02:45,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443327629] [2021-01-06 17:02:45,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:45,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:45,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:45,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:45,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:45,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:45,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:45,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491306659] [2021-01-06 17:02:45,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:45,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:45,294 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 19 states. [2021-01-06 17:02:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:45,470 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:02:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:45,471 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:45,471 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:02:45,471 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:02:45,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:02:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2021-01-06 17:02:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:45,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:45,540 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:45,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:45,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:45,541 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:45,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-01-06 17:02:45,741 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash -186267222, now seen corresponding path program 231 times [2021-01-06 17:02:45,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:45,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231921110] [2021-01-06 17:02:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:45,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231921110] [2021-01-06 17:02:45,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988563376] [2021-01-06 17:02:45,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:45,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:45,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:45,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:46,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:46,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:46,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776142768] [2021-01-06 17:02:46,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:46,027 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:46,282 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:02:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:46,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:46,283 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:02:46,283 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:02:46,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:02:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:02:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:46,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:46,392 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:46,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:46,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:46,393 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:46,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-01-06 17:02:46,607 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1959427542, now seen corresponding path program 232 times [2021-01-06 17:02:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:46,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71940396] [2021-01-06 17:02:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:46,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71940396] [2021-01-06 17:02:46,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868204463] [2021-01-06 17:02:46,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:46,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:46,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:46,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:46,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:46,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756244250] [2021-01-06 17:02:46,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:46,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:46,858 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 20 states. [2021-01-06 17:02:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:47,585 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-01-06 17:02:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:47,586 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:47,586 INFO L225 Difference]: With dead ends: 51 [2021-01-06 17:02:47,586 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:02:47,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:02:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-01-06 17:02:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:47,652 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:47,652 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:47,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:47,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:47,652 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:47,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:47,853 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1961274584, now seen corresponding path program 233 times [2021-01-06 17:02:47,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:47,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270228216] [2021-01-06 17:02:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:47,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270228216] [2021-01-06 17:02:47,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495366098] [2021-01-06 17:02:47,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:47,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:47,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:48,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:48,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:48,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325500619] [2021-01-06 17:02:48,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:48,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:48,139 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:48,324 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:02:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:48,325 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:48,326 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:02:48,326 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:02:48,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:02:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-01-06 17:02:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:02:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:02:48,381 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2021-01-06 17:02:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:48,382 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:02:48,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:02:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:48,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:48,382 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:48,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-01-06 17:02:48,583 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:48,583 INFO L82 PathProgramCache]: Analyzing trace with hash -205426388, now seen corresponding path program 234 times [2021-01-06 17:02:48,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:48,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792233474] [2021-01-06 17:02:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:48,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792233474] [2021-01-06 17:02:48,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630100945] [2021-01-06 17:02:48,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:48,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:48,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:48,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:48,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:48,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:48,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011305331] [2021-01-06 17:02:48,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:48,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:48,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:48,870 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 19 states. [2021-01-06 17:02:49,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:49,049 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:02:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:49,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:49,051 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:02:49,051 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:02:49,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:02:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-01-06 17:02:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:49,118 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:49,118 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:49,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:49,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:49,118 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:49,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:49,319 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash -207273430, now seen corresponding path program 235 times [2021-01-06 17:02:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:49,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135160811] [2021-01-06 17:02:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:49,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135160811] [2021-01-06 17:02:49,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260778019] [2021-01-06 17:02:49,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:49,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:49,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:49,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:49,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514065533] [2021-01-06 17:02:49,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:49,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:49,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:49,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:49,597 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:49,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:49,776 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:02:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:49,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:49,777 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:02:49,777 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:02:49,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:02:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-01-06 17:02:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:49,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:49,849 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:49,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:49,849 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:49,849 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:50,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-01-06 17:02:50,056 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1980433750, now seen corresponding path program 236 times [2021-01-06 17:02:50,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:50,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369942344] [2021-01-06 17:02:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:50,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369942344] [2021-01-06 17:02:50,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413910611] [2021-01-06 17:02:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:50,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:50,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:50,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:50,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:50,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063037190] [2021-01-06 17:02:50,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:50,351 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:50,531 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:02:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:50,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:50,532 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:02:50,533 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:02:50,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:02:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-01-06 17:02:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:50,603 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:50,603 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:50,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:50,604 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:50,604 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:50,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:50,812 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1982280792, now seen corresponding path program 237 times [2021-01-06 17:02:50,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:50,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642992841] [2021-01-06 17:02:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:50,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642992841] [2021-01-06 17:02:50,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689464191] [2021-01-06 17:02:50,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:50,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:02:50,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:50,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:51,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:51,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895074346] [2021-01-06 17:02:51,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:51,096 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:51,273 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:02:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:51,274 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:51,275 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:02:51,275 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:02:51,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:02:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2021-01-06 17:02:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:02:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:02:51,338 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 20 [2021-01-06 17:02:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:51,338 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:02:51,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:02:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:51,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:51,338 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:51,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:51,541 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash -885484758, now seen corresponding path program 238 times [2021-01-06 17:02:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:51,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830701997] [2021-01-06 17:02:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:51,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830701997] [2021-01-06 17:02:51,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893622812] [2021-01-06 17:02:51,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:51,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:51,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:51,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:02:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:51,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:51,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-01-06 17:02:51,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097347152] [2021-01-06 17:02:51,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:02:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:02:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:02:51,815 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 20 states. [2021-01-06 17:02:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:52,511 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:02:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:02:52,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2021-01-06 17:02:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:52,512 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:02:52,512 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:02:52,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:02:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:02:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2021-01-06 17:02:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:52,577 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:52,578 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:52,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:02:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:52,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:52,578 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:52,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable252 [2021-01-06 17:02:52,782 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash -887331800, now seen corresponding path program 239 times [2021-01-06 17:02:52,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:52,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126298719] [2021-01-06 17:02:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126298719] [2021-01-06 17:02:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646414783] [2021-01-06 17:02:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:52,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:02:52,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:53,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:53,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:53,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492277297] [2021-01-06 17:02:53,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:53,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:53,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:53,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:53,063 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:53,222 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:02:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:53,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:53,223 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:02:53,223 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:02:53,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:02:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-01-06 17:02:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:53,289 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 20 [2021-01-06 17:02:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:53,289 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:53,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:53,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:53,290 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:53,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:53,491 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1634475176, now seen corresponding path program 240 times [2021-01-06 17:02:53,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:53,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981557597] [2021-01-06 17:02:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981557597] [2021-01-06 17:02:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041831939] [2021-01-06 17:02:53,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:53,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:02:53,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:53,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:53,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:53,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:53,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:53,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769653635] [2021-01-06 17:02:53,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:53,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:53,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:53,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:53,782 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 19 states. [2021-01-06 17:02:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:53,955 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-01-06 17:02:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:53,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:53,957 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:02:53,957 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:02:53,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:02:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-01-06 17:02:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:54,024 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 20 [2021-01-06 17:02:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:54,024 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:54,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:02:54,024 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:54,024 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:54,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:54,237 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 7 times [2021-01-06 17:02:54,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:54,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479356032] [2021-01-06 17:02:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:54,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479356032] [2021-01-06 17:02:54,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888612514] [2021-01-06 17:02:54,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:02:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:54,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:54,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:02:54,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330035459] [2021-01-06 17:02:54,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:02:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:02:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:54,526 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 19 states. [2021-01-06 17:02:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:54,689 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-01-06 17:02:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:02:54,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2021-01-06 17:02:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:54,693 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:02:54,693 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:02:54,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:02:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:02:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2021-01-06 17:02:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:02:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-01-06 17:02:54,737 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 20 [2021-01-06 17:02:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:54,738 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-01-06 17:02:54,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:02:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-01-06 17:02:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:02:54,738 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:54,738 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:54,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-01-06 17:02:54,944 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:54,945 INFO L82 PathProgramCache]: Analyzing trace with hash -643067495, now seen corresponding path program 8 times [2021-01-06 17:02:54,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:54,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831750274] [2021-01-06 17:02:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:55,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831750274] [2021-01-06 17:02:55,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104184711] [2021-01-06 17:02:55,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:55,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:55,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:55,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:02:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:55,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:55,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:02:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017345506] [2021-01-06 17:02:55,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:02:55,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:02:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:55,277 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 21 states. [2021-01-06 17:02:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:55,553 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:02:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:02:55,554 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:02:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:55,555 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:02:55,555 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:02:55,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:02:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:02:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:02:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:02:55,649 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:02:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:55,649 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:02:55,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:02:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:02:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:02:55,650 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:55,650 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:55,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:55,851 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:55,851 INFO L82 PathProgramCache]: Analyzing trace with hash -644914537, now seen corresponding path program 241 times [2021-01-06 17:02:55,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:55,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070636682] [2021-01-06 17:02:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:55,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070636682] [2021-01-06 17:02:55,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666348092] [2021-01-06 17:02:55,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:02:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:56,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:56,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:02:56,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696582389] [2021-01-06 17:02:56,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:02:56,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:02:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:56,181 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:02:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:56,437 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:02:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:02:56,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:02:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:56,438 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:02:56,438 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:02:56,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:02:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:02:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:02:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:02:56,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:02:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:56,541 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:02:56,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:02:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:02:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:02:56,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:56,541 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:56,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-01-06 17:02:56,748 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1876892439, now seen corresponding path program 242 times [2021-01-06 17:02:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:56,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225542505] [2021-01-06 17:02:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:56,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225542505] [2021-01-06 17:02:56,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894896284] [2021-01-06 17:02:56,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:56,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:02:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:57,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:57,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:02:57,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974887663] [2021-01-06 17:02:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:02:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:57,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:02:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:57,077 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:02:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:57,339 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:02:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:02:57,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:02:57,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:57,340 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:02:57,341 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:02:57,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:02:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2021-01-06 17:02:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:02:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:02:57,426 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:02:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:57,426 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:02:57,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:02:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:02:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:02:57,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:57,427 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:57,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:57,628 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1875045397, now seen corresponding path program 243 times [2021-01-06 17:02:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:57,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030047233] [2021-01-06 17:02:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030047233] [2021-01-06 17:02:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076634552] [2021-01-06 17:02:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:57,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:02:57,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:57,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:02:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:57,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:57,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:02:57,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695816267] [2021-01-06 17:02:57,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:02:57,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:57,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:02:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:57,964 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:02:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:58,221 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:02:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:02:58,222 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:02:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:58,222 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:02:58,222 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:02:58,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:02:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:02:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-01-06 17:02:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:02:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:02:58,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:02:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:58,297 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:02:58,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:02:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:02:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:02:58,297 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:58,297 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:58,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-01-06 17:02:58,498 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1323125865, now seen corresponding path program 244 times [2021-01-06 17:02:58,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:58,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411112278] [2021-01-06 17:02:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:58,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411112278] [2021-01-06 17:02:58,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648975856] [2021-01-06 17:02:58,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:58,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:58,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:02:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:58,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:58,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:02:58,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212726058] [2021-01-06 17:02:58,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:02:58,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:02:58,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:02:58,852 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 22 states. [2021-01-06 17:02:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:59,723 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2021-01-06 17:02:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:02:59,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:02:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:59,725 INFO L225 Difference]: With dead ends: 80 [2021-01-06 17:02:59,725 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 17:02:59,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:02:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 17:02:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 37. [2021-01-06 17:02:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:02:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:02:59,806 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:02:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:59,806 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:02:59,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:02:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:02:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:02:59,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:59,806 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:00,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:00,007 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:00,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1324972907, now seen corresponding path program 245 times [2021-01-06 17:03:00,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:00,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170515871] [2021-01-06 17:03:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:00,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170515871] [2021-01-06 17:03:00,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351905698] [2021-01-06 17:03:00,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:00,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:00,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:00,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:00,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:00,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:00,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195581579] [2021-01-06 17:03:00,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:00,338 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:00,617 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:03:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:00,617 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:00,618 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:03:00,618 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:03:00,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:03:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:03:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:00,697 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:00,697 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:00,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:00,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:00,697 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:00,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:00,905 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1196834069, now seen corresponding path program 246 times [2021-01-06 17:03:00,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:00,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105811495] [2021-01-06 17:03:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:01,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105811495] [2021-01-06 17:03:01,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136537043] [2021-01-06 17:03:01,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:01,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:01,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:01,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:01,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:01,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:01,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099993432] [2021-01-06 17:03:01,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:01,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:01,234 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:01,482 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:03:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:01,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:01,483 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:03:01,483 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:03:01,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:03:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2021-01-06 17:03:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:01,567 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:01,568 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:01,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:01,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:01,568 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:01,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:01,769 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1194987027, now seen corresponding path program 247 times [2021-01-06 17:03:01,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:01,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930966325] [2021-01-06 17:03:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930966325] [2021-01-06 17:03:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988064409] [2021-01-06 17:03:01,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:02,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:02,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:02,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344446159] [2021-01-06 17:03:02,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:02,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:02,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:02,093 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:02,346 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:03:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:02,346 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:02,347 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:02,347 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:03:02,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:03:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-01-06 17:03:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:03:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:03:02,415 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 22 [2021-01-06 17:03:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:02,415 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:03:02,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:03:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:02,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:02,415 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:02,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:02,616 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:02,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1344132073, now seen corresponding path program 248 times [2021-01-06 17:03:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:02,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157363746] [2021-01-06 17:03:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:02,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157363746] [2021-01-06 17:03:02,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602369249] [2021-01-06 17:03:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:02,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:02,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:02,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:02,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:02,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111442993] [2021-01-06 17:03:02,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:02,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:02,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:02,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:02,971 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 21 states. [2021-01-06 17:03:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:03,234 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:03:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:03,235 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:03,235 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:03,235 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:03:03,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:03:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:03:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:03,317 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:03,317 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:03,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:03,318 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:03,318 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:03,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-01-06 17:03:03,518 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1345979115, now seen corresponding path program 249 times [2021-01-06 17:03:03,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:03,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847295594] [2021-01-06 17:03:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:03,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847295594] [2021-01-06 17:03:03,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144429483] [2021-01-06 17:03:03,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:03,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:03,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:03,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:03,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082587938] [2021-01-06 17:03:03,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:03,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:03,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:03,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:03,853 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:04,095 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:03:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:04,096 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:04,096 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:03:04,096 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:03:04,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:03:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:03:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:04,176 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:04,176 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:04,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:04,176 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:04,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:04,176 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:04,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-01-06 17:03:04,379 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1175827861, now seen corresponding path program 250 times [2021-01-06 17:03:04,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:04,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212909890] [2021-01-06 17:03:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:04,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212909890] [2021-01-06 17:03:04,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422765686] [2021-01-06 17:03:04,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:04,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:04,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:04,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:04,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:04,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:04,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369514392] [2021-01-06 17:03:04,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:04,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:04,722 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:03:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:05,616 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2021-01-06 17:03:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:03:05,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:05,617 INFO L225 Difference]: With dead ends: 78 [2021-01-06 17:03:05,618 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 17:03:05,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:03:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 17:03:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 37. [2021-01-06 17:03:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:05,699 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:05,700 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:05,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:05,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:05,700 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:05,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-01-06 17:03:05,901 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1173980819, now seen corresponding path program 251 times [2021-01-06 17:03:05,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:05,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254628340] [2021-01-06 17:03:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254628340] [2021-01-06 17:03:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785876266] [2021-01-06 17:03:06,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:06,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:06,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:06,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:06,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:06,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:06,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162442463] [2021-01-06 17:03:06,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:06,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:06,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:06,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:06,247 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:06,507 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:03:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:06,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:06,508 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:03:06,509 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:03:06,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:03:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2021-01-06 17:03:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:03:06,587 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:03:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:06,587 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:03:06,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:03:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:06,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:06,587 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:06,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-01-06 17:03:06,788 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2024190443, now seen corresponding path program 252 times [2021-01-06 17:03:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:06,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716713911] [2021-01-06 17:03:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:06,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716713911] [2021-01-06 17:03:06,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763815366] [2021-01-06 17:03:06,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:06,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:07,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:07,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:07,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899463762] [2021-01-06 17:03:07,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:07,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:07,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:07,125 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:03:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:07,375 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:03:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:07,376 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:07,377 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:03:07,377 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:07,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-01-06 17:03:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:07,461 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:07,461 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:07,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:07,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:07,462 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:07,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-01-06 17:03:07,669 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2026037485, now seen corresponding path program 253 times [2021-01-06 17:03:07,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:07,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290800033] [2021-01-06 17:03:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290800033] [2021-01-06 17:03:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497992757] [2021-01-06 17:03:07,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:08,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:08,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:08,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392241014] [2021-01-06 17:03:08,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:08,011 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:08,254 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:03:08,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:08,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:08,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:08,256 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:03:08,256 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:08,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:08,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:03:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:08,336 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:08,336 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:08,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:08,336 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:08,336 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:08,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-01-06 17:03:08,537 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 495769491, now seen corresponding path program 254 times [2021-01-06 17:03:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:08,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217175359] [2021-01-06 17:03:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:08,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217175359] [2021-01-06 17:03:08,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415564674] [2021-01-06 17:03:08,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:08,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:08,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:08,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:08,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:08,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:08,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612337174] [2021-01-06 17:03:08,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:08,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:08,884 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:09,137 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:03:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:09,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:09,139 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:03:09,139 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:03:09,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:03:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-01-06 17:03:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:09,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:09,221 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:09,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:09,221 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:09,221 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:09,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:09,422 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:09,422 INFO L82 PathProgramCache]: Analyzing trace with hash 493922449, now seen corresponding path program 255 times [2021-01-06 17:03:09,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:09,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044740828] [2021-01-06 17:03:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:09,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044740828] [2021-01-06 17:03:09,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173194022] [2021-01-06 17:03:09,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:09,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:09,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:09,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:09,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:09,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241493374] [2021-01-06 17:03:09,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:09,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:09,769 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:10,014 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:03:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:10,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:10,015 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:03:10,015 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:03:10,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:03:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2021-01-06 17:03:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:03:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:03:10,076 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 22 [2021-01-06 17:03:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:10,076 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:03:10,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:03:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:10,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:10,077 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:10,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:10,277 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash -56261481, now seen corresponding path program 256 times [2021-01-06 17:03:10,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:10,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246515850] [2021-01-06 17:03:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:10,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246515850] [2021-01-06 17:03:10,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214581132] [2021-01-06 17:03:10,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:10,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:10,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:10,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:10,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:10,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701381756] [2021-01-06 17:03:10,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:10,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:10,622 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 22 states. [2021-01-06 17:03:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:11,544 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2021-01-06 17:03:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:03:11,545 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:11,546 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:03:11,546 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 17:03:11,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:03:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 17:03:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2021-01-06 17:03:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:11,634 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:11,634 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:11,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:11,634 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:11,635 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:11,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:11,835 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -58108523, now seen corresponding path program 257 times [2021-01-06 17:03:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:11,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046504723] [2021-01-06 17:03:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:11,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046504723] [2021-01-06 17:03:11,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286580359] [2021-01-06 17:03:11,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:11,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:11,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:11,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:12,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:12,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:12,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607569094] [2021-01-06 17:03:12,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:12,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:12,183 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:12,479 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:03:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:12,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:12,480 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:03:12,480 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:03:12,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:03:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:03:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:12,563 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:12,563 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:12,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:12,563 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:12,563 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:12,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:12,764 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1831268843, now seen corresponding path program 258 times [2021-01-06 17:03:12,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:12,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169173840] [2021-01-06 17:03:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:12,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169173840] [2021-01-06 17:03:12,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122463117] [2021-01-06 17:03:12,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:12,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:12,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:13,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:13,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:13,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305344664] [2021-01-06 17:03:13,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:13,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:13,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:13,117 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:13,381 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:03:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:13,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:13,382 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:03:13,382 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:03:13,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:03:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2021-01-06 17:03:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:13,470 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:13,470 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:13,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:13,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:13,471 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:13,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:13,672 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1833115885, now seen corresponding path program 259 times [2021-01-06 17:03:13,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:13,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257744422] [2021-01-06 17:03:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:13,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257744422] [2021-01-06 17:03:13,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105362534] [2021-01-06 17:03:13,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:14,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:14,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:14,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510987866] [2021-01-06 17:03:14,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:14,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:14,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:14,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:14,014 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:14,296 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:03:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:14,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:14,298 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:14,298 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:03:14,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:03:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-01-06 17:03:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:03:14,375 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:03:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:14,376 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:03:14,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:03:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:14,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:14,376 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:14,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:14,577 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash -736319851, now seen corresponding path program 260 times [2021-01-06 17:03:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:14,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097072939] [2021-01-06 17:03:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:14,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097072939] [2021-01-06 17:03:14,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211003294] [2021-01-06 17:03:14,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:14,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:14,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:14,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:14,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:14,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:14,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649559818] [2021-01-06 17:03:14,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:14,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:14,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:14,917 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:03:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:15,197 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:03:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:15,198 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:15,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:15,198 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:03:15,198 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:03:15,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:03:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:03:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:15,282 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:15,283 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:15,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:15,283 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:15,283 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:15,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-01-06 17:03:15,484 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash -738166893, now seen corresponding path program 261 times [2021-01-06 17:03:15,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:15,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555572694] [2021-01-06 17:03:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:15,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555572694] [2021-01-06 17:03:15,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180780967] [2021-01-06 17:03:15,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:15,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:15,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:15,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:15,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:15,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813746433] [2021-01-06 17:03:15,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:15,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:15,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:15,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:15,831 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:16,130 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:03:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:16,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:16,132 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:03:16,132 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:03:16,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:03:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:03:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:16,216 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:16,216 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:16,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:16,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:16,216 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:16,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-01-06 17:03:16,417 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1783640083, now seen corresponding path program 262 times [2021-01-06 17:03:16,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:16,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319758593] [2021-01-06 17:03:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319758593] [2021-01-06 17:03:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032816877] [2021-01-06 17:03:16,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-01-06 17:03:16,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:16,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:16,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:16,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:16,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:16,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568212653] [2021-01-06 17:03:16,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:16,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:16,722 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:03:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:17,676 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2021-01-06 17:03:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:03:17,676 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:17,677 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:03:17,677 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 17:03:17,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:03:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 17:03:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 37. [2021-01-06 17:03:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:17,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:17,764 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:17,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:17,764 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:17,764 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:17,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-01-06 17:03:17,965 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1781793041, now seen corresponding path program 263 times [2021-01-06 17:03:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:17,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666045144] [2021-01-06 17:03:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:18,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666045144] [2021-01-06 17:03:18,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292612494] [2021-01-06 17:03:18,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:18,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:18,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:18,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:18,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:18,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520324790] [2021-01-06 17:03:18,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:18,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:18,311 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:18,563 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:03:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:18,564 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:18,564 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:18,565 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:03:18,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:03:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-01-06 17:03:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:03:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:03:18,635 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 22 [2021-01-06 17:03:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:18,635 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:03:18,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:03:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:18,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:18,635 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:18,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-01-06 17:03:18,836 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash -757326059, now seen corresponding path program 264 times [2021-01-06 17:03:18,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:18,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024800094] [2021-01-06 17:03:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:18,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024800094] [2021-01-06 17:03:18,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728590317] [2021-01-06 17:03:18,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:18,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:18,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:19,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:19,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:19,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681344646] [2021-01-06 17:03:19,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:19,187 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 21 states. [2021-01-06 17:03:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:19,462 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:03:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:19,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:19,464 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:19,464 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:03:19,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:03:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:03:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:19,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:19,548 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:19,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:19,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:19,548 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:19,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:19,749 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash -759173101, now seen corresponding path program 265 times [2021-01-06 17:03:19,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:19,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648477600] [2021-01-06 17:03:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:19,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648477600] [2021-01-06 17:03:19,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558504748] [2021-01-06 17:03:19,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:20,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:20,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677698821] [2021-01-06 17:03:20,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:20,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:20,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:20,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:20,089 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:20,365 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:03:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:20,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:20,366 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:03:20,366 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:03:20,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:03:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:03:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:20,449 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:20,450 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:20,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:20,450 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:20,450 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:20,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-01-06 17:03:20,651 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1762633875, now seen corresponding path program 266 times [2021-01-06 17:03:20,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:20,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460877107] [2021-01-06 17:03:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:20,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460877107] [2021-01-06 17:03:20,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756635850] [2021-01-06 17:03:20,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:20,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:20,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:20,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:20,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:20,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:20,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709819450] [2021-01-06 17:03:20,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:20,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:20,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:20,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:20,997 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:21,274 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:03:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:21,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:21,275 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:21,276 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:03:21,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:03:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:03:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:21,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:21,360 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:21,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:21,361 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:21,361 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:21,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:21,562 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:21,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1760786833, now seen corresponding path program 267 times [2021-01-06 17:03:21,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:21,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201090055] [2021-01-06 17:03:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:21,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201090055] [2021-01-06 17:03:21,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391066692] [2021-01-06 17:03:21,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:21,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:21,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:21,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:21,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:21,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:21,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445703868] [2021-01-06 17:03:21,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:21,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:21,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:21,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:21,902 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:22,176 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:03:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:22,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:22,177 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:03:22,177 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:03:22,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:03:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2021-01-06 17:03:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:03:22,258 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:03:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:22,258 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:03:22,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:03:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:22,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:22,258 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:22,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:22,459 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1437384429, now seen corresponding path program 268 times [2021-01-06 17:03:22,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:22,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129270829] [2021-01-06 17:03:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:22,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129270829] [2021-01-06 17:03:22,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241197112] [2021-01-06 17:03:22,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:22,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:22,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:22,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:22,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:22,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:22,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495344962] [2021-01-06 17:03:22,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:22,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:22,812 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 22 states. [2021-01-06 17:03:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:23,751 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2021-01-06 17:03:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:03:23,751 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:23,752 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:03:23,752 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 17:03:23,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:03:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 17:03:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2021-01-06 17:03:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:23,846 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:23,846 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:23,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:23,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:23,847 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:24,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:24,047 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:24,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1439231471, now seen corresponding path program 269 times [2021-01-06 17:03:24,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:24,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374778654] [2021-01-06 17:03:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:24,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374778654] [2021-01-06 17:03:24,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931849777] [2021-01-06 17:03:24,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:24,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:24,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:24,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:24,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:24,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110404328] [2021-01-06 17:03:24,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:24,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:24,396 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:24,667 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:03:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:24,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:24,669 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:03:24,669 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:24,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:03:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:24,752 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:24,752 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:24,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:24,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:24,752 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:24,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:24,953 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1082575505, now seen corresponding path program 270 times [2021-01-06 17:03:24,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:24,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959182691] [2021-01-06 17:03:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:25,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959182691] [2021-01-06 17:03:25,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989153395] [2021-01-06 17:03:25,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:25,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:25,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:25,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:25,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:25,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993533793] [2021-01-06 17:03:25,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:25,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:25,303 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:25,560 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:03:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:25,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:25,562 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:03:25,562 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:03:25,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:03:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-01-06 17:03:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:25,658 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:25,658 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:25,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:25,658 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:25,658 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:25,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:25,859 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:25,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1080728463, now seen corresponding path program 271 times [2021-01-06 17:03:25,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:25,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247242256] [2021-01-06 17:03:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:25,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247242256] [2021-01-06 17:03:25,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045460] [2021-01-06 17:03:25,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:26,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:26,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:26,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:26,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:26,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324342816] [2021-01-06 17:03:26,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:26,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:26,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:26,204 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:26,455 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:03:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:26,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:26,456 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:03:26,457 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:03:26,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:03:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 27. [2021-01-06 17:03:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:03:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:03:26,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 22 [2021-01-06 17:03:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:26,515 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:03:26,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:03:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:26,516 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:26,516 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:26,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:26,722 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash 636796183, now seen corresponding path program 272 times [2021-01-06 17:03:26,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:26,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780154876] [2021-01-06 17:03:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:26,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780154876] [2021-01-06 17:03:26,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66730115] [2021-01-06 17:03:26,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:26,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:26,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:26,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:27,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:27,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:27,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092100631] [2021-01-06 17:03:27,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:27,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:27,065 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 21 states. [2021-01-06 17:03:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:27,340 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:03:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:27,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:27,341 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:03:27,341 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:03:27,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:03:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-01-06 17:03:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:27,434 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:27,435 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:27,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:27,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:27,435 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:27,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-01-06 17:03:27,636 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 634949141, now seen corresponding path program 273 times [2021-01-06 17:03:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:27,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799815990] [2021-01-06 17:03:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:27,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799815990] [2021-01-06 17:03:27,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144980969] [2021-01-06 17:03:27,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:27,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:27,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:27,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:27,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:27,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994104872] [2021-01-06 17:03:27,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:27,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:27,974 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:28,333 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:03:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:28,334 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:28,334 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:03:28,334 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:28,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:03:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:28,479 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:28,479 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:28,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:28,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:28,480 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:28,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:28,694 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1138211179, now seen corresponding path program 274 times [2021-01-06 17:03:28,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:28,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765539626] [2021-01-06 17:03:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765539626] [2021-01-06 17:03:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613527696] [2021-01-06 17:03:28,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:28,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:28,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:28,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:28,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:29,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:29,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:29,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413482956] [2021-01-06 17:03:29,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:29,028 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:03:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:30,062 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2021-01-06 17:03:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:03:30,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:30,063 INFO L225 Difference]: With dead ends: 80 [2021-01-06 17:03:30,063 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 17:03:30,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:03:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 17:03:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 37. [2021-01-06 17:03:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:30,157 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:30,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:30,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:30,157 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:30,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-01-06 17:03:30,358 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1140058221, now seen corresponding path program 275 times [2021-01-06 17:03:30,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:30,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223703578] [2021-01-06 17:03:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:30,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223703578] [2021-01-06 17:03:30,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749434095] [2021-01-06 17:03:30,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:30,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:30,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:30,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:30,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:30,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264017693] [2021-01-06 17:03:30,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:30,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:30,707 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:30,973 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:03:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:30,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:30,974 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:03:30,974 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:30,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-01-06 17:03:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:03:31,057 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:03:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:31,057 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:03:31,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:03:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:31,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:31,057 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:31,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:31,258 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash -43262187, now seen corresponding path program 276 times [2021-01-06 17:03:31,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:31,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464108315] [2021-01-06 17:03:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:31,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464108315] [2021-01-06 17:03:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98446980] [2021-01-06 17:03:31,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:31,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:31,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:31,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:31,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:31,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:31,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:31,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710938924] [2021-01-06 17:03:31,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:31,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:31,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:31,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:31,600 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:03:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:31,863 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:03:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:31,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:31,864 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:03:31,864 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:03:31,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:03:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-01-06 17:03:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:31,957 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:31,957 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:31,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:31,958 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:31,958 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:32,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-01-06 17:03:32,159 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash -45109229, now seen corresponding path program 277 times [2021-01-06 17:03:32,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:32,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23687746] [2021-01-06 17:03:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:32,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23687746] [2021-01-06 17:03:32,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496670788] [2021-01-06 17:03:32,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:32,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:32,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:32,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:32,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:32,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399112975] [2021-01-06 17:03:32,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:32,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:32,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:32,507 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:32,823 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:03:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:32,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:32,824 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:03:32,824 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:03:32,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:03:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2021-01-06 17:03:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:32,912 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:32,912 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:32,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:32,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:32,913 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:33,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:33,114 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1818269549, now seen corresponding path program 278 times [2021-01-06 17:03:33,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:33,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292251282] [2021-01-06 17:03:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:33,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292251282] [2021-01-06 17:03:33,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082755333] [2021-01-06 17:03:33,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:33,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:33,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:33,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:33,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:33,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134340612] [2021-01-06 17:03:33,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:33,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:33,466 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:33,726 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:03:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:33,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:33,727 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:03:33,727 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:03:33,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:03:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-01-06 17:03:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:33,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:33,822 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:33,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:33,822 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:33,822 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:34,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:34,023 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1820116591, now seen corresponding path program 279 times [2021-01-06 17:03:34,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:34,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346594734] [2021-01-06 17:03:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:34,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346594734] [2021-01-06 17:03:34,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643750013] [2021-01-06 17:03:34,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:34,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:34,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:34,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:34,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990801715] [2021-01-06 17:03:34,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:34,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:34,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:34,374 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:34,616 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:03:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:34,617 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:34,617 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:03:34,617 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:03:34,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:03:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 17:03:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:03:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:03:34,694 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 22 [2021-01-06 17:03:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:34,694 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:03:34,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:03:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:34,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:34,694 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:34,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:34,895 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -64268395, now seen corresponding path program 280 times [2021-01-06 17:03:34,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:34,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292829937] [2021-01-06 17:03:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292829937] [2021-01-06 17:03:35,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820290668] [2021-01-06 17:03:35,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:35,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:35,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:35,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:35,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:35,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:35,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:35,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749728469] [2021-01-06 17:03:35,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:35,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:35,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:35,205 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 22 states. [2021-01-06 17:03:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:36,221 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2021-01-06 17:03:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:03:36,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:36,223 INFO L225 Difference]: With dead ends: 76 [2021-01-06 17:03:36,223 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:03:36,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:03:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:03:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 37. [2021-01-06 17:03:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:36,318 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:36,318 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:36,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:36,319 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:36,319 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:36,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:36,520 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:36,520 INFO L82 PathProgramCache]: Analyzing trace with hash -66115437, now seen corresponding path program 281 times [2021-01-06 17:03:36,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:36,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476245849] [2021-01-06 17:03:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:36,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476245849] [2021-01-06 17:03:36,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944878572] [2021-01-06 17:03:36,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:36,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:36,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:36,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:36,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:36,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:36,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:36,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145301450] [2021-01-06 17:03:36,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:36,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:36,839 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:37,098 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:03:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:37,099 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:37,100 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:03:37,100 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:37,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:03:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:37,190 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:37,190 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:37,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:37,190 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:37,190 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:37,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2021-01-06 17:03:37,391 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1839275757, now seen corresponding path program 282 times [2021-01-06 17:03:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:37,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054878573] [2021-01-06 17:03:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:37,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054878573] [2021-01-06 17:03:37,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772518691] [2021-01-06 17:03:37,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:37,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:37,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:37,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:37,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977007256] [2021-01-06 17:03:37,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:37,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:37,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:37,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:37,748 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:38,037 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:03:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:38,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:38,038 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:03:38,038 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:03:38,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:03:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-01-06 17:03:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:38,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:38,135 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:38,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:38,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:38,136 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:38,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-01-06 17:03:38,337 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1841122799, now seen corresponding path program 283 times [2021-01-06 17:03:38,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:38,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556795748] [2021-01-06 17:03:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:38,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556795748] [2021-01-06 17:03:38,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764156894] [2021-01-06 17:03:38,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:38,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:38,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:38,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248595286] [2021-01-06 17:03:38,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:38,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:38,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:38,684 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:38,965 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:03:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:38,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:38,967 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:03:38,967 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:38,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-01-06 17:03:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:03:39,063 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:03:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:39,063 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:03:39,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:03:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:39,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:39,064 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:39,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:39,265 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash -744326765, now seen corresponding path program 284 times [2021-01-06 17:03:39,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:39,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253707834] [2021-01-06 17:03:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:39,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253707834] [2021-01-06 17:03:39,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794216167] [2021-01-06 17:03:39,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:39,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:39,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:39,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:39,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:39,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:39,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650666427] [2021-01-06 17:03:39,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:39,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:39,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:39,611 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:03:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:39,903 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:03:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:39,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:39,904 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:03:39,905 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:03:39,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:03:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-01-06 17:03:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:40,000 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:40,000 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:40,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:40,000 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:40,000 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:40,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-01-06 17:03:40,201 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash -746173807, now seen corresponding path program 285 times [2021-01-06 17:03:40,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:40,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185668536] [2021-01-06 17:03:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:40,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185668536] [2021-01-06 17:03:40,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833452815] [2021-01-06 17:03:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:40,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:40,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:40,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:40,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099623891] [2021-01-06 17:03:40,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:40,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:40,547 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:40,805 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:03:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:40,806 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:40,807 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:03:40,807 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:03:40,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:03:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2021-01-06 17:03:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:40,897 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:40,897 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:40,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:40,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:40,897 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:41,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-01-06 17:03:41,103 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:41,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:41,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1775633169, now seen corresponding path program 286 times [2021-01-06 17:03:41,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:41,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103611728] [2021-01-06 17:03:41,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103611728] [2021-01-06 17:03:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955369136] [2021-01-06 17:03:41,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:41,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:41,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:41,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:41,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:41,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:41,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322615998] [2021-01-06 17:03:41,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:41,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:41,404 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:03:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:42,363 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:03:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:03:42,364 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:42,364 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:03:42,364 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:03:42,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:03:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:03:42,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:03:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:42,462 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:42,462 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:42,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:42,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:42,463 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:42,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-01-06 17:03:42,664 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1773786127, now seen corresponding path program 287 times [2021-01-06 17:03:42,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:42,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934162491] [2021-01-06 17:03:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:42,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934162491] [2021-01-06 17:03:42,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913035138] [2021-01-06 17:03:42,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:42,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:43,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:43,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:43,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383630234] [2021-01-06 17:03:43,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:43,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:43,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:43,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:43,009 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:43,252 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:03:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:43,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:43,253 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:03:43,253 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:03:43,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:03:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-01-06 17:03:43,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:03:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:03:43,324 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 22 [2021-01-06 17:03:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:43,324 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:03:43,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:03:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:43,324 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:43,324 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:43,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:43,525 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1223602197, now seen corresponding path program 288 times [2021-01-06 17:03:43,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:43,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429482929] [2021-01-06 17:03:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:43,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429482929] [2021-01-06 17:03:43,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558432590] [2021-01-06 17:03:43,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:43,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:43,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:43,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:43,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949571818] [2021-01-06 17:03:43,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:43,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:43,883 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 21 states. [2021-01-06 17:03:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:44,144 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:03:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:44,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:44,146 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:03:44,146 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:03:44,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:03:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-01-06 17:03:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:44,249 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:44,249 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:44,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:44,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:44,250 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:44,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-01-06 17:03:44,451 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1221755155, now seen corresponding path program 289 times [2021-01-06 17:03:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:44,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331368246] [2021-01-06 17:03:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:44,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331368246] [2021-01-06 17:03:44,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904363699] [2021-01-06 17:03:44,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:44,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:44,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:44,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:44,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767249031] [2021-01-06 17:03:44,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:44,762 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:45,110 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:03:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:45,111 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:45,112 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:03:45,112 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:03:45,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:03:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-01-06 17:03:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:45,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:45,204 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:45,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:45,204 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:45,204 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:45,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-01-06 17:03:45,405 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -551405165, now seen corresponding path program 290 times [2021-01-06 17:03:45,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:45,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554428956] [2021-01-06 17:03:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:45,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554428956] [2021-01-06 17:03:45,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256701259] [2021-01-06 17:03:45,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:45,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:45,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:45,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:45,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:45,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134771616] [2021-01-06 17:03:45,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:45,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:45,752 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:46,013 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:03:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:46,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:46,015 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:03:46,015 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:03:46,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:03:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-01-06 17:03:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:46,117 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:46,117 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:46,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:46,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:46,118 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:46,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:46,319 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -553252207, now seen corresponding path program 291 times [2021-01-06 17:03:46,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:46,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713156487] [2021-01-06 17:03:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:46,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713156487] [2021-01-06 17:03:46,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275801734] [2021-01-06 17:03:46,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:46,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:46,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:46,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:46,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:46,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500213484] [2021-01-06 17:03:46,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:46,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:46,668 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:46,898 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:03:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:46,899 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:46,899 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:03:46,899 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:03:46,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:03:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-01-06 17:03:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:03:46,986 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:03:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:46,986 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:03:46,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:03:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:46,986 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:46,986 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:47,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-01-06 17:03:47,187 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash 543543827, now seen corresponding path program 292 times [2021-01-06 17:03:47,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:47,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040456261] [2021-01-06 17:03:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:47,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040456261] [2021-01-06 17:03:47,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361333638] [2021-01-06 17:03:47,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:47,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:47,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:47,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:47,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775315001] [2021-01-06 17:03:47,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:47,532 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 22 states. [2021-01-06 17:03:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:48,524 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-01-06 17:03:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:03:48,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:48,526 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:03:48,526 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:03:48,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:03:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:03:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2021-01-06 17:03:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:48,621 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:48,622 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:48,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:48,622 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:48,622 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:48,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:48,823 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:48,823 INFO L82 PathProgramCache]: Analyzing trace with hash 541696785, now seen corresponding path program 293 times [2021-01-06 17:03:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:48,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770892793] [2021-01-06 17:03:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:48,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770892793] [2021-01-06 17:03:48,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489045642] [2021-01-06 17:03:48,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:48,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:49,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:49,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:49,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442449255] [2021-01-06 17:03:49,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:49,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:49,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:49,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:49,179 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:49,446 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:03:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:49,447 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:49,448 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:03:49,448 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:03:49,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:03:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-01-06 17:03:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:49,547 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:49,547 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:49,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:49,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:49,547 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:49,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-01-06 17:03:49,748 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1231463535, now seen corresponding path program 294 times [2021-01-06 17:03:49,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:49,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750334988] [2021-01-06 17:03:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:49,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750334988] [2021-01-06 17:03:49,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502063053] [2021-01-06 17:03:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:49,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:50,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:50,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979521789] [2021-01-06 17:03:50,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:50,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:50,093 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:50,368 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:03:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:50,369 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:50,369 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:03:50,369 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:03:50,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:03:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-01-06 17:03:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:50,465 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:50,465 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:50,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:50,465 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:50,465 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:50,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-01-06 17:03:50,666 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:50,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1233310577, now seen corresponding path program 295 times [2021-01-06 17:03:50,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:50,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188666418] [2021-01-06 17:03:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:50,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188666418] [2021-01-06 17:03:50,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065129091] [2021-01-06 17:03:50,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:51,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:51,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:51,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503470438] [2021-01-06 17:03:51,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:51,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:51,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:51,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:51,015 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:51,275 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:03:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:51,276 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:51,276 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:03:51,276 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:03:51,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:03:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-01-06 17:03:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:03:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:03:51,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 22 [2021-01-06 17:03:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:51,363 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:03:51,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:03:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:51,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:51,363 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:51,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:51,564 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:51,565 INFO L82 PathProgramCache]: Analyzing trace with hash 522537619, now seen corresponding path program 296 times [2021-01-06 17:03:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:51,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075618964] [2021-01-06 17:03:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:51,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075618964] [2021-01-06 17:03:51,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292735171] [2021-01-06 17:03:51,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:51,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:51,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:51,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:51,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:51,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127299193] [2021-01-06 17:03:51,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:51,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:51,915 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 21 states. [2021-01-06 17:03:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:52,150 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:03:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:52,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:52,151 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:03:52,151 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:03:52,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:03:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-01-06 17:03:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:52,247 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:52,247 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:52,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:52,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:52,248 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:52,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-01-06 17:03:52,449 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:52,449 INFO L82 PathProgramCache]: Analyzing trace with hash 520690577, now seen corresponding path program 297 times [2021-01-06 17:03:52,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:52,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811833562] [2021-01-06 17:03:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:52,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811833562] [2021-01-06 17:03:52,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116567506] [2021-01-06 17:03:52,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:52,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:52,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:52,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:52,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:52,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:52,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442739640] [2021-01-06 17:03:52,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:52,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:52,801 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:53,044 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:03:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:53,045 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:53,045 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:03:53,045 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:03:53,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:03:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-01-06 17:03:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:53,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:53,143 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:53,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:53,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:53,143 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:53,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:53,344 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1252469743, now seen corresponding path program 298 times [2021-01-06 17:03:53,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:53,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215174257] [2021-01-06 17:03:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:53,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215174257] [2021-01-06 17:03:53,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627982132] [2021-01-06 17:03:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:53,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:53,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:53,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:53,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:53,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:53,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:53,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982652842] [2021-01-06 17:03:53,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:53,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:53,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:53,688 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:03:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:54,641 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:03:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:03:54,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:03:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:54,642 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:54,642 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:03:54,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:03:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:03:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:03:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:54,742 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:54,742 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:54,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:54,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:54,742 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:54,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-01-06 17:03:54,943 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1254316785, now seen corresponding path program 299 times [2021-01-06 17:03:54,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:54,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141000988] [2021-01-06 17:03:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:55,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141000988] [2021-01-06 17:03:55,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077443132] [2021-01-06 17:03:55,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:55,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:55,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:55,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:55,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:55,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947615835] [2021-01-06 17:03:55,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:55,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:55,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:55,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:55,296 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:55,551 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 17:03:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:55,552 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:55,553 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:03:55,553 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:03:55,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:03:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2021-01-06 17:03:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:03:55,641 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:03:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:55,642 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:03:55,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:03:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:55,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:55,642 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:55,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:55,843 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash -157520751, now seen corresponding path program 300 times [2021-01-06 17:03:55,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:55,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579856700] [2021-01-06 17:03:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:55,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579856700] [2021-01-06 17:03:55,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933594020] [2021-01-06 17:03:55,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:56,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:56,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:56,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:56,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:56,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:56,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415252643] [2021-01-06 17:03:56,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:56,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:56,200 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:03:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:56,423 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:03:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:56,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:56,424 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:03:56,424 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:03:56,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:03:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-01-06 17:03:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:56,525 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:56,525 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:56,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:56,526 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:56,526 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:56,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:56,726 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:56,727 INFO L82 PathProgramCache]: Analyzing trace with hash -159367793, now seen corresponding path program 301 times [2021-01-06 17:03:56,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:56,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044682117] [2021-01-06 17:03:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:56,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044682117] [2021-01-06 17:03:56,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614972259] [2021-01-06 17:03:56,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:56,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:56,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:57,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:57,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:57,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410016281] [2021-01-06 17:03:57,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:57,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:57,074 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:57,318 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-01-06 17:03:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:57,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:57,320 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:03:57,320 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:03:57,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:03:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2021-01-06 17:03:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:03:57,414 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:03:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:57,414 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:03:57,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:03:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:57,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:57,415 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:57,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:57,615 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1932528113, now seen corresponding path program 302 times [2021-01-06 17:03:57,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:57,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901499131] [2021-01-06 17:03:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:57,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901499131] [2021-01-06 17:03:57,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207985407] [2021-01-06 17:03:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:57,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:57,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:57,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:57,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:57,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:57,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087803573] [2021-01-06 17:03:57,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:57,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:57,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:57,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:57,962 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:03:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:58,200 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-01-06 17:03:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:58,201 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:58,201 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:03:58,201 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:03:58,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:03:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-01-06 17:03:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:03:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:03:58,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:03:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:58,298 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:03:58,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:03:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:58,298 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:58,298 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:58,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:58,499 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1934375155, now seen corresponding path program 303 times [2021-01-06 17:03:58,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:58,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840367297] [2021-01-06 17:03:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:58,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840367297] [2021-01-06 17:03:58,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884306111] [2021-01-06 17:03:58,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:58,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:03:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:58,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:58,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:03:58,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530731360] [2021-01-06 17:03:58,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:58,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:58,857 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:03:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:59,084 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2021-01-06 17:03:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:59,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:03:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:59,085 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:03:59,085 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:03:59,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:03:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2021-01-06 17:03:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:03:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 17:03:59,148 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 22 [2021-01-06 17:03:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:59,148 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 17:03:59,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 17:03:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:59,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:59,149 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:59,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-01-06 17:03:59,349 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:59,350 INFO L82 PathProgramCache]: Analyzing trace with hash 945280407, now seen corresponding path program 304 times [2021-01-06 17:03:59,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:59,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602892812] [2021-01-06 17:03:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602892812] [2021-01-06 17:03:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450423120] [2021-01-06 17:03:59,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:59,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:59,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:03:59,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:59,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:59,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:03:59,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555092131] [2021-01-06 17:03:59,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:59,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:59,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:59,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:59,692 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 22 states. [2021-01-06 17:04:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:00,811 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2021-01-06 17:04:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:00,812 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:00,812 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:04:00,813 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 17:04:00,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 17:04:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2021-01-06 17:04:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:00,939 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:00,939 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:00,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:00,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:00,939 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:01,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-01-06 17:04:01,140 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash 943433365, now seen corresponding path program 305 times [2021-01-06 17:04:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:01,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861286304] [2021-01-06 17:04:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:01,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861286304] [2021-01-06 17:04:01,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823610435] [2021-01-06 17:04:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:01,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:01,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:01,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:01,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:01,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86840339] [2021-01-06 17:04:01,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:01,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:01,499 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:01,836 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:01,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:01,837 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:01,837 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:01,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:04:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:01,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:01,968 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:01,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:01,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:01,968 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:02,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:02,169 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash -829726955, now seen corresponding path program 306 times [2021-01-06 17:04:02,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:02,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901218348] [2021-01-06 17:04:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:02,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901218348] [2021-01-06 17:04:02,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583226256] [2021-01-06 17:04:02,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:02,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:02,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:02,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298320636] [2021-01-06 17:04:02,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:02,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:02,526 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:02,857 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:04:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:02,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:02,858 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:04:02,858 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:04:02,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:04:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2021-01-06 17:04:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:02,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:02,966 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:02,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:02,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:02,966 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:03,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-01-06 17:04:03,167 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:03,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:03,167 INFO L82 PathProgramCache]: Analyzing trace with hash -831573997, now seen corresponding path program 307 times [2021-01-06 17:04:03,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:03,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96892806] [2021-01-06 17:04:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:03,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96892806] [2021-01-06 17:04:03,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838704927] [2021-01-06 17:04:03,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:03,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:03,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:03,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:03,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702637999] [2021-01-06 17:04:03,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:03,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:03,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:03,525 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:03,851 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:03,852 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:03,852 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:03,853 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:03,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-01-06 17:04:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:04:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:04:03,952 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:04:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:03,953 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:04:03,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:04:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:03,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:03,953 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:04,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-01-06 17:04:04,154 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash 265222037, now seen corresponding path program 308 times [2021-01-06 17:04:04,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:04,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465970933] [2021-01-06 17:04:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:04,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465970933] [2021-01-06 17:04:04,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904799718] [2021-01-06 17:04:04,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:04,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:04,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:04,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:04,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:04,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:04,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299126647] [2021-01-06 17:04:04,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:04,506 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:04:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:04,852 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:04,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:04,854 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:04,854 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:04,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:04:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:04,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:04,965 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:04,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:04,965 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:04,965 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:05,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-01-06 17:04:05,166 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash 263374995, now seen corresponding path program 309 times [2021-01-06 17:04:05,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:05,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840970294] [2021-01-06 17:04:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:05,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840970294] [2021-01-06 17:04:05,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870012967] [2021-01-06 17:04:05,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:05,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:05,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:05,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:05,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:05,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:05,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079232183] [2021-01-06 17:04:05,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:05,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:05,524 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:05,873 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:05,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:05,875 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:05,875 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:05,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:04:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:05,984 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:05,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:05,984 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:05,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:05,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:05,985 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:06,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:06,186 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:06,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1509785325, now seen corresponding path program 310 times [2021-01-06 17:04:06,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:06,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087857553] [2021-01-06 17:04:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087857553] [2021-01-06 17:04:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131007700] [2021-01-06 17:04:06,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:06,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:06,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:06,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:06,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:06,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:06,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409285179] [2021-01-06 17:04:06,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:06,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:06,525 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:04:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:07,546 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2021-01-06 17:04:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:07,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:07,547 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:04:07,547 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 17:04:07,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 17:04:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 37. [2021-01-06 17:04:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:07,654 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:07,654 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:07,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:07,655 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:07,655 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:07,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-01-06 17:04:07,856 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1511632367, now seen corresponding path program 311 times [2021-01-06 17:04:07,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:07,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835569387] [2021-01-06 17:04:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:07,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835569387] [2021-01-06 17:04:07,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211305120] [2021-01-06 17:04:07,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:08,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:08,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:08,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:08,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:08,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570885918] [2021-01-06 17:04:08,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:08,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:08,209 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:08,535 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:08,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:08,537 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:08,537 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:08,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-01-06 17:04:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:04:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:04:08,628 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 22 [2021-01-06 17:04:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:08,628 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:04:08,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:04:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:08,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:08,628 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:08,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-01-06 17:04:08,829 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:08,830 INFO L82 PathProgramCache]: Analyzing trace with hash 244215829, now seen corresponding path program 312 times [2021-01-06 17:04:08,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:08,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522423677] [2021-01-06 17:04:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:08,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522423677] [2021-01-06 17:04:08,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709184279] [2021-01-06 17:04:08,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:08,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:08,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:09,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:09,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:09,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884336600] [2021-01-06 17:04:09,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:09,191 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 21 states. [2021-01-06 17:04:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:09,511 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:09,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:09,513 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:09,513 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:09,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:04:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:09,621 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:09,621 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:09,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:09,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:09,621 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:09,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:09,822 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash 242368787, now seen corresponding path program 313 times [2021-01-06 17:04:09,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:09,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894032090] [2021-01-06 17:04:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:09,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894032090] [2021-01-06 17:04:09,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358467877] [2021-01-06 17:04:09,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:09,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:09,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:10,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:10,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:10,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183238937] [2021-01-06 17:04:10,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:10,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:10,174 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:10,498 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:04:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:10,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:10,500 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:04:10,500 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:04:10,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:04:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:04:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:10,609 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:10,609 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:10,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:10,609 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:10,609 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:10,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-01-06 17:04:10,810 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:10,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1530791533, now seen corresponding path program 314 times [2021-01-06 17:04:10,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:10,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430758159] [2021-01-06 17:04:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:10,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430758159] [2021-01-06 17:04:10,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550420614] [2021-01-06 17:04:10,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:10,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:10,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:10,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:10,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:11,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:11,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:11,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091873232] [2021-01-06 17:04:11,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:11,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:11,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:11,167 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:11,497 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:11,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:11,498 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:11,498 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:11,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:04:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:11,611 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:11,611 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:11,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:11,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:11,612 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:11,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:11,813 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:11,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1532638575, now seen corresponding path program 315 times [2021-01-06 17:04:11,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:11,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205219762] [2021-01-06 17:04:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:11,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205219762] [2021-01-06 17:04:11,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694499849] [2021-01-06 17:04:11,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:11,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:12,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:12,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:12,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822959405] [2021-01-06 17:04:12,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:12,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:12,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:12,168 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:12,488 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:04:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:12,489 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:12,489 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:04:12,490 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:04:12,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:04:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2021-01-06 17:04:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:04:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:04:12,590 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:04:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:12,590 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:04:12,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:04:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:12,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:12,590 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:12,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-01-06 17:04:12,791 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:12,792 INFO L82 PathProgramCache]: Analyzing trace with hash -435842541, now seen corresponding path program 316 times [2021-01-06 17:04:12,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:12,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846248109] [2021-01-06 17:04:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:12,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846248109] [2021-01-06 17:04:12,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825143524] [2021-01-06 17:04:12,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:12,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:12,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:12,940 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:13,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:13,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124750393] [2021-01-06 17:04:13,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:13,146 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 22 states. [2021-01-06 17:04:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:14,214 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2021-01-06 17:04:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:14,215 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:14,216 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:04:14,216 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 17:04:14,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 17:04:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2021-01-06 17:04:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:14,327 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:14,327 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:14,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:14,328 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:14,328 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:14,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-01-06 17:04:14,529 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash -437689583, now seen corresponding path program 317 times [2021-01-06 17:04:14,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:14,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410124381] [2021-01-06 17:04:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:14,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410124381] [2021-01-06 17:04:14,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505887121] [2021-01-06 17:04:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:14,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:14,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:14,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:14,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:14,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:14,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103978657] [2021-01-06 17:04:14,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:14,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:14,884 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:15,198 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:04:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:15,199 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:15,200 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:04:15,200 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:04:15,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:04:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:04:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:15,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:15,311 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:15,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:15,312 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:15,312 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:15,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-01-06 17:04:15,513 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2084117393, now seen corresponding path program 318 times [2021-01-06 17:04:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:15,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057216073] [2021-01-06 17:04:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:15,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057216073] [2021-01-06 17:04:15,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643556552] [2021-01-06 17:04:15,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:15,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:15,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:15,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:15,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:15,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542513832] [2021-01-06 17:04:15,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:15,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:15,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:15,870 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:16,174 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:04:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:16,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:16,176 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:04:16,176 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:04:16,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:04:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-01-06 17:04:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:16,286 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:16,287 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:16,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:16,287 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:16,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:16,287 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:16,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-01-06 17:04:16,488 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2082270351, now seen corresponding path program 319 times [2021-01-06 17:04:16,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:16,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821251745] [2021-01-06 17:04:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821251745] [2021-01-06 17:04:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549680443] [2021-01-06 17:04:16,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:16,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:16,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:16,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:16,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186850718] [2021-01-06 17:04:16,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:16,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:16,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:16,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:16,845 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:17,141 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:04:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:17,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:17,142 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:04:17,142 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:04:17,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:04:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2021-01-06 17:04:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:04:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:04:17,226 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 22 [2021-01-06 17:04:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:17,226 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:04:17,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:04:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:17,226 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:17,226 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:17,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-01-06 17:04:17,427 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:17,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1532086421, now seen corresponding path program 320 times [2021-01-06 17:04:17,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:17,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773921178] [2021-01-06 17:04:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:17,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773921178] [2021-01-06 17:04:17,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050461987] [2021-01-06 17:04:17,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:17,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:17,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:17,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:17,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:17,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772184508] [2021-01-06 17:04:17,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:17,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:17,779 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 21 states. [2021-01-06 17:04:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:18,138 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:18,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:18,140 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:18,140 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:18,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:04:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:18,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:18,255 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:18,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:18,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:18,255 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:18,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:18,456 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:18,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1530239379, now seen corresponding path program 321 times [2021-01-06 17:04:18,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:18,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634119018] [2021-01-06 17:04:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:18,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634119018] [2021-01-06 17:04:18,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688877912] [2021-01-06 17:04:18,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:18,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:18,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:18,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:18,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:18,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:18,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369184574] [2021-01-06 17:04:18,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:18,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:18,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:18,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:18,818 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:19,176 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:19,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:19,178 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:19,178 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:19,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:04:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:19,312 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:19,312 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:19,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:19,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:19,313 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:19,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-01-06 17:04:19,514 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:19,514 INFO L82 PathProgramCache]: Analyzing trace with hash -242920941, now seen corresponding path program 322 times [2021-01-06 17:04:19,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:19,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782267594] [2021-01-06 17:04:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:19,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782267594] [2021-01-06 17:04:19,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263078597] [2021-01-06 17:04:19,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:19,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:19,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:19,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:19,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:19,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:19,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:19,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977949039] [2021-01-06 17:04:19,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:19,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:19,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:19,866 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:04:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:20,928 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2021-01-06 17:04:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:20,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:20,929 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:04:20,929 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 17:04:20,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 17:04:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2021-01-06 17:04:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:21,044 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:21,044 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:21,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:21,045 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:21,045 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:21,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-01-06 17:04:21,245 INFO L429 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash -244767983, now seen corresponding path program 323 times [2021-01-06 17:04:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656905357] [2021-01-06 17:04:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:21,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656905357] [2021-01-06 17:04:21,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935153263] [2021-01-06 17:04:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:21,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:21,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:21,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:21,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:21,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5244577] [2021-01-06 17:04:21,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:21,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:21,602 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:21,934 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:21,935 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:21,936 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:21,936 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:21,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-01-06 17:04:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:04:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:04:22,049 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:04:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:22,049 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:04:22,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:04:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:22,049 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:22,049 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:22,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:22,250 INFO L429 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:22,251 INFO L82 PathProgramCache]: Analyzing trace with hash 852028051, now seen corresponding path program 324 times [2021-01-06 17:04:22,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:22,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712816598] [2021-01-06 17:04:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:22,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712816598] [2021-01-06 17:04:22,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19463471] [2021-01-06 17:04:22,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:22,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:22,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:22,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:22,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:22,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:22,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905500819] [2021-01-06 17:04:22,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:22,614 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:04:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:22,961 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:22,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:22,963 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:22,963 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:22,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:04:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:23,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:23,074 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:23,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:23,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:23,075 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:23,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:23,275 INFO L429 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:23,276 INFO L82 PathProgramCache]: Analyzing trace with hash 850181009, now seen corresponding path program 325 times [2021-01-06 17:04:23,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:23,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767138470] [2021-01-06 17:04:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:23,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767138470] [2021-01-06 17:04:23,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112120460] [2021-01-06 17:04:23,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:23,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:23,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:23,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720776522] [2021-01-06 17:04:23,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:23,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:23,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:23,602 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:23,957 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:23,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:23,958 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:23,959 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:23,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2021-01-06 17:04:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:24,067 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:24,067 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:24,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:24,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:24,067 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:24,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:24,275 INFO L429 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:24,275 INFO L82 PathProgramCache]: Analyzing trace with hash -922979311, now seen corresponding path program 326 times [2021-01-06 17:04:24,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:24,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356665529] [2021-01-06 17:04:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:24,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356665529] [2021-01-06 17:04:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598556674] [2021-01-06 17:04:24,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:24,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:24,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:24,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:24,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:24,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:24,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154833780] [2021-01-06 17:04:24,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:24,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:24,622 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:24,977 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-01-06 17:04:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:24,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:24,978 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:04:24,978 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:04:24,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:04:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2021-01-06 17:04:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:25,090 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:25,091 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:25,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:25,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:25,091 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:25,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:25,292 INFO L429 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:25,292 INFO L82 PathProgramCache]: Analyzing trace with hash -924826353, now seen corresponding path program 327 times [2021-01-06 17:04:25,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:25,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126154715] [2021-01-06 17:04:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:25,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126154715] [2021-01-06 17:04:25,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996496231] [2021-01-06 17:04:25,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:25,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:25,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:25,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:25,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:25,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:25,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260696300] [2021-01-06 17:04:25,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:25,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:25,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:25,656 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:25,995 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:25,996 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:25,996 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:25,996 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:25,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-01-06 17:04:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:04:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:04:26,092 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 22 [2021-01-06 17:04:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:26,093 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:04:26,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:04:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:26,093 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:26,093 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:26,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-01-06 17:04:26,294 INFO L429 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash 831021843, now seen corresponding path program 328 times [2021-01-06 17:04:26,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:26,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442532056] [2021-01-06 17:04:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:26,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442532056] [2021-01-06 17:04:26,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827685906] [2021-01-06 17:04:26,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:26,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:26,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:26,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:26,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:26,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:26,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771627499] [2021-01-06 17:04:26,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:26,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:26,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:26,654 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 22 states. [2021-01-06 17:04:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:27,727 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:27,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:27,729 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:27,729 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:27,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:04:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:27,845 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:27,845 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:27,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:27,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:27,846 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:28,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:28,046 INFO L429 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 829174801, now seen corresponding path program 329 times [2021-01-06 17:04:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538899916] [2021-01-06 17:04:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:28,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538899916] [2021-01-06 17:04:28,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908131729] [2021-01-06 17:04:28,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:28,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:28,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:28,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:28,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:28,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526639903] [2021-01-06 17:04:28,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:28,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:28,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:28,407 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:28,767 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:04:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:28,768 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:28,768 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:04:28,768 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:04:28,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:04:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-01-06 17:04:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:28,878 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:28,879 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:28,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:28,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:28,879 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:29,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-01-06 17:04:29,080 INFO L429 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash -943985519, now seen corresponding path program 330 times [2021-01-06 17:04:29,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:29,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938625361] [2021-01-06 17:04:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:29,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938625361] [2021-01-06 17:04:29,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000906185] [2021-01-06 17:04:29,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:29,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:29,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:29,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:29,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338291751] [2021-01-06 17:04:29,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:29,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:29,437 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:29,762 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:29,763 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:29,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:29,763 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:29,764 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:29,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:04:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:29,876 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:29,876 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:29,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:29,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:29,877 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:30,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:30,078 INFO L429 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash -945832561, now seen corresponding path program 331 times [2021-01-06 17:04:30,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:30,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001151793] [2021-01-06 17:04:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001151793] [2021-01-06 17:04:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062162858] [2021-01-06 17:04:30,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:30,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:30,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:30,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533409460] [2021-01-06 17:04:30,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:30,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:30,435 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:30,755 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:04:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:30,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:30,756 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:04:30,757 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:04:30,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:04:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2021-01-06 17:04:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:04:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:04:30,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:04:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:30,861 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:04:30,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:04:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:30,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:30,861 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:31,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-01-06 17:04:31,062 INFO L429 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash 150963473, now seen corresponding path program 332 times [2021-01-06 17:04:31,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:31,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032555707] [2021-01-06 17:04:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:31,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032555707] [2021-01-06 17:04:31,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948230813] [2021-01-06 17:04:31,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:31,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:31,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:31,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:31,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:31,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564244979] [2021-01-06 17:04:31,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:31,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:31,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:31,422 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:04:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:31,717 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:04:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:31,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:31,719 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:04:31,719 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:04:31,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:04:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-01-06 17:04:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:31,834 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:31,834 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:31,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:31,834 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:31,834 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:32,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:32,035 INFO L429 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:32,036 INFO L82 PathProgramCache]: Analyzing trace with hash 149116431, now seen corresponding path program 333 times [2021-01-06 17:04:32,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:32,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073360967] [2021-01-06 17:04:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073360967] [2021-01-06 17:04:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947006155] [2021-01-06 17:04:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:32,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:32,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:32,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:32,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:32,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:32,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:32,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382134041] [2021-01-06 17:04:32,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:32,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:32,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:32,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:32,401 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:32,700 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:04:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:32,701 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:32,701 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:04:32,702 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:04:32,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:04:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:04:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:32,815 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:32,815 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:32,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:32,816 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:32,816 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:33,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:33,017 INFO L429 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1624043889, now seen corresponding path program 334 times [2021-01-06 17:04:33,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:33,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775901730] [2021-01-06 17:04:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775901730] [2021-01-06 17:04:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224841535] [2021-01-06 17:04:33,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:33,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:33,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:33,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:33,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374960354] [2021-01-06 17:04:33,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:33,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:33,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:33,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:33,373 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:04:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:34,335 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-01-06 17:04:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:34,336 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:34,337 INFO L225 Difference]: With dead ends: 57 [2021-01-06 17:04:34,337 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 17:04:34,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 17:04:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2021-01-06 17:04:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:34,449 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:34,449 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:34,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:34,449 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:34,449 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:34,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:34,650 INFO L429 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1625890931, now seen corresponding path program 335 times [2021-01-06 17:04:34,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:34,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940237916] [2021-01-06 17:04:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:34,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940237916] [2021-01-06 17:04:34,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866943665] [2021-01-06 17:04:34,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:34,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:34,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:34,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:35,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:35,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:35,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368405236] [2021-01-06 17:04:35,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:35,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:35,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:35,012 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:35,298 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:04:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:35,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:35,300 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:04:35,300 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:04:35,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:04:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 27. [2021-01-06 17:04:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:04:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 17:04:35,379 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 22 [2021-01-06 17:04:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:35,379 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 17:04:35,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 17:04:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:35,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:35,379 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:35,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:35,580 INFO L429 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2069823211, now seen corresponding path program 336 times [2021-01-06 17:04:35,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:35,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688122831] [2021-01-06 17:04:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688122831] [2021-01-06 17:04:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769495092] [2021-01-06 17:04:35,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:35,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:35,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:35,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:35,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:35,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:35,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664990022] [2021-01-06 17:04:35,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:35,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:35,944 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 21 states. [2021-01-06 17:04:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:36,256 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:04:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:36,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:36,257 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:04:36,257 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:04:36,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:04:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-01-06 17:04:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:36,378 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:36,378 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:36,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:36,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:36,379 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:36,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:36,580 INFO L429 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2071670253, now seen corresponding path program 337 times [2021-01-06 17:04:36,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:36,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114416830] [2021-01-06 17:04:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:36,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114416830] [2021-01-06 17:04:36,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697678977] [2021-01-06 17:04:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:36,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:36,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:36,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035342873] [2021-01-06 17:04:36,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:36,934 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:37,230 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:04:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:37,231 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:37,232 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:04:37,232 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:04:37,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:04:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:04:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:37,355 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:37,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:37,356 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:37,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:37,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:37,356 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:37,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-01-06 17:04:37,557 INFO L429 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:37,557 INFO L82 PathProgramCache]: Analyzing trace with hash 450136723, now seen corresponding path program 338 times [2021-01-06 17:04:37,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:37,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573450812] [2021-01-06 17:04:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:37,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573450812] [2021-01-06 17:04:37,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630547199] [2021-01-06 17:04:37,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:37,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:37,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:37,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:37,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864200915] [2021-01-06 17:04:37,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:37,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:37,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:37,914 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:38,240 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:04:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:38,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:38,242 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:04:38,242 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:04:38,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:04:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-01-06 17:04:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:38,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:38,360 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:38,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:38,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:38,360 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:38,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:38,561 INFO L429 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash 448289681, now seen corresponding path program 339 times [2021-01-06 17:04:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:38,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747569153] [2021-01-06 17:04:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747569153] [2021-01-06 17:04:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927107324] [2021-01-06 17:04:38,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:38,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:38,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:38,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:38,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:38,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:38,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437049101] [2021-01-06 17:04:38,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:38,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:38,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:38,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:38,926 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:39,235 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:04:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:39,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:39,237 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:04:39,237 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:04:39,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:04:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-01-06 17:04:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:04:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:04:39,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:04:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:39,345 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:04:39,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:04:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:39,346 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:39,346 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:39,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-01-06 17:04:39,547 INFO L429 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:39,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:39,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1545085715, now seen corresponding path program 340 times [2021-01-06 17:04:39,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:39,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514344157] [2021-01-06 17:04:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:39,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514344157] [2021-01-06 17:04:39,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411875009] [2021-01-06 17:04:39,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:39,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:39,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:39,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:39,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:39,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355291850] [2021-01-06 17:04:39,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:39,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:39,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:39,903 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 22 states. [2021-01-06 17:04:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:40,942 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-01-06 17:04:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:40,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:40,943 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:04:40,943 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:04:40,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:04:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-01-06 17:04:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:41,065 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:41,065 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:41,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:41,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:41,066 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:41,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-01-06 17:04:41,266 INFO L429 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:41,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1543238673, now seen corresponding path program 341 times [2021-01-06 17:04:41,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:41,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265663362] [2021-01-06 17:04:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:41,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265663362] [2021-01-06 17:04:41,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315552955] [2021-01-06 17:04:41,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:41,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:41,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:41,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:41,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:41,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:41,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42540587] [2021-01-06 17:04:41,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:41,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:41,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:41,627 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:41,946 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:04:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:41,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:41,948 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:04:41,948 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:04:41,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:41,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:04:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2021-01-06 17:04:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:42,065 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:42,065 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:42,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:42,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:42,065 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:42,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-01-06 17:04:42,266 INFO L429 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:42,267 INFO L82 PathProgramCache]: Analyzing trace with hash -229921647, now seen corresponding path program 342 times [2021-01-06 17:04:42,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:42,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956913876] [2021-01-06 17:04:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956913876] [2021-01-06 17:04:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178595051] [2021-01-06 17:04:42,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:42,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:42,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:42,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:42,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:42,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109503206] [2021-01-06 17:04:42,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:42,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:42,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:42,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:42,634 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:42,938 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:04:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:42,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:42,940 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:04:42,940 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:04:42,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:04:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-01-06 17:04:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:43,059 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:43,059 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:43,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:43,059 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:43,059 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:43,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-01-06 17:04:43,260 INFO L429 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash -231768689, now seen corresponding path program 343 times [2021-01-06 17:04:43,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:43,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967727836] [2021-01-06 17:04:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:43,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967727836] [2021-01-06 17:04:43,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253115372] [2021-01-06 17:04:43,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:43,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:43,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:43,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:43,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562280492] [2021-01-06 17:04:43,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:43,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:43,611 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:43,890 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:04:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:43,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:43,892 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:04:43,892 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:04:43,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:04:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 17:04:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:04:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2021-01-06 17:04:43,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 22 [2021-01-06 17:04:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:43,996 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2021-01-06 17:04:43,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2021-01-06 17:04:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:43,996 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:43,997 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:44,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-01-06 17:04:44,197 INFO L429 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1524079507, now seen corresponding path program 344 times [2021-01-06 17:04:44,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:44,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277086578] [2021-01-06 17:04:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:44,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277086578] [2021-01-06 17:04:44,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096868280] [2021-01-06 17:04:44,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:44,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:44,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:44,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:44,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:44,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:44,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887437949] [2021-01-06 17:04:44,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:44,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:44,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:44,519 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 21 states. [2021-01-06 17:04:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:44,841 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-01-06 17:04:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:44,843 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:44,843 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:04:44,843 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:04:44,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:04:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-01-06 17:04:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:44,968 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:44,968 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:44,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:44,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:44,969 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:45,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:45,170 INFO L429 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1522232465, now seen corresponding path program 345 times [2021-01-06 17:04:45,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:45,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013856807] [2021-01-06 17:04:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:45,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013856807] [2021-01-06 17:04:45,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825233854] [2021-01-06 17:04:45,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:45,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:45,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:45,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:45,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178658359] [2021-01-06 17:04:45,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:45,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:45,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:45,534 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:45,847 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:04:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:45,848 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:45,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:45,849 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:04:45,849 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:04:45,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:04:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:04:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:45,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:45,969 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:45,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:45,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:45,969 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:46,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:46,170 INFO L429 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:46,170 INFO L82 PathProgramCache]: Analyzing trace with hash -250927855, now seen corresponding path program 346 times [2021-01-06 17:04:46,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:46,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358449382] [2021-01-06 17:04:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:46,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358449382] [2021-01-06 17:04:46,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477966935] [2021-01-06 17:04:46,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:46,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:46,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:46,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:46,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:46,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408417190] [2021-01-06 17:04:46,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:46,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:46,531 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 22 states. [2021-01-06 17:04:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:47,557 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2021-01-06 17:04:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:47,559 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:47,559 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:04:47,559 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:04:47,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:04:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2021-01-06 17:04:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:47,686 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:47,686 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:47,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:47,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:47,686 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:47,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:47,887 INFO L429 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash -252774897, now seen corresponding path program 347 times [2021-01-06 17:04:47,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:47,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379247855] [2021-01-06 17:04:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:48,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379247855] [2021-01-06 17:04:48,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685431138] [2021-01-06 17:04:48,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:48,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:48,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:48,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:48,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125151936] [2021-01-06 17:04:48,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:48,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:48,248 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:48,555 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-01-06 17:04:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:48,556 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:48,557 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:04:48,557 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:04:48,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:04:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2021-01-06 17:04:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:04:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:04:48,669 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:04:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:48,669 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:04:48,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:04:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:48,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:48,669 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:48,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:48,870 INFO L429 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:48,871 INFO L82 PathProgramCache]: Analyzing trace with hash 844021137, now seen corresponding path program 348 times [2021-01-06 17:04:48,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:48,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18979785] [2021-01-06 17:04:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18979785] [2021-01-06 17:04:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393045768] [2021-01-06 17:04:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:49,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:49,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:49,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:49,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:49,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593203354] [2021-01-06 17:04:49,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:49,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:49,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:49,237 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:04:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:49,545 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:04:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:49,546 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:49,546 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:04:49,546 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:04:49,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:04:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-01-06 17:04:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:49,671 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:49,672 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:49,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:49,672 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:49,672 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:49,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-01-06 17:04:49,873 INFO L429 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash 842174095, now seen corresponding path program 349 times [2021-01-06 17:04:49,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:49,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426650618] [2021-01-06 17:04:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:49,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426650618] [2021-01-06 17:04:49,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361767285] [2021-01-06 17:04:49,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:50,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:50,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:50,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164346823] [2021-01-06 17:04:50,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:50,228 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:50,542 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-01-06 17:04:50,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:50,543 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:50,544 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:04:50,544 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:04:50,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:04:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2021-01-06 17:04:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:50,665 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:50,665 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:50,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:50,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:50,665 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:50,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-01-06 17:04:50,866 INFO L429 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -930986225, now seen corresponding path program 350 times [2021-01-06 17:04:50,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:50,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381478006] [2021-01-06 17:04:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:50,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381478006] [2021-01-06 17:04:50,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327709736] [2021-01-06 17:04:50,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:51,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:51,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:51,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:51,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:51,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215072101] [2021-01-06 17:04:51,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:51,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:51,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:51,226 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:51,528 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:04:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:51,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:51,530 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:04:51,530 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:04:51,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:04:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-01-06 17:04:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:51,649 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:51,649 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:51,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:51,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:51,650 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:51,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-01-06 17:04:51,850 INFO L429 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:51,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:51,851 INFO L82 PathProgramCache]: Analyzing trace with hash -932833267, now seen corresponding path program 351 times [2021-01-06 17:04:51,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:51,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353102111] [2021-01-06 17:04:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:51,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353102111] [2021-01-06 17:04:51,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69052440] [2021-01-06 17:04:51,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:52,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:52,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:52,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:52,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:52,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:52,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:52,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858342756] [2021-01-06 17:04:52,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:52,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:52,208 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:52,495 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:04:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:52,496 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:52,497 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:04:52,497 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:04:52,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:04:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-01-06 17:04:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:04:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-01-06 17:04:52,586 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 22 [2021-01-06 17:04:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:52,587 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-01-06 17:04:52,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-01-06 17:04:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:52,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:52,587 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:52,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-01-06 17:04:52,788 INFO L429 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1483017197, now seen corresponding path program 352 times [2021-01-06 17:04:52,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:52,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189556923] [2021-01-06 17:04:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:52,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189556923] [2021-01-06 17:04:52,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638768895] [2021-01-06 17:04:52,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:52,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:52,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:52,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:53,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:53,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-01-06 17:04:53,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854240315] [2021-01-06 17:04:53,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:04:53,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:04:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:53,147 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 22 states. [2021-01-06 17:04:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:54,178 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-01-06 17:04:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:04:54,179 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2021-01-06 17:04:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:54,179 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:04:54,179 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:04:54,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:04:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:04:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 17:04:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:54,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:54,301 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:54,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:04:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:54,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:54,301 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:54,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-01-06 17:04:54,502 INFO L429 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1484864239, now seen corresponding path program 353 times [2021-01-06 17:04:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:54,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765647822] [2021-01-06 17:04:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:54,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765647822] [2021-01-06 17:04:54,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157577599] [2021-01-06 17:04:54,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:54,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:04:54,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:54,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:54,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:54,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:54,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142102979] [2021-01-06 17:04:54,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:54,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:54,870 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:55,178 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:04:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:55,178 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:55,179 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:04:55,179 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:04:55,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:04:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-01-06 17:04:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:55,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:55,298 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:55,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:55,298 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:55,298 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:55,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:55,499 INFO L429 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:55,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1036942737, now seen corresponding path program 354 times [2021-01-06 17:04:55,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:55,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890507773] [2021-01-06 17:04:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:55,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890507773] [2021-01-06 17:04:55,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264061983] [2021-01-06 17:04:55,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:55,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:04:55,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:55,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:55,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:55,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:55,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:55,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774384502] [2021-01-06 17:04:55,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:55,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:55,870 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 21 states. [2021-01-06 17:04:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:56,152 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 17:04:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:56,153 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:56,154 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:04:56,154 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:04:56,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:04:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-01-06 17:04:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:56,279 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:56,280 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:56,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:56,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:56,280 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:56,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:56,481 INFO L429 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1035095695, now seen corresponding path program 355 times [2021-01-06 17:04:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:56,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495055105] [2021-01-06 17:04:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:56,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495055105] [2021-01-06 17:04:56,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534523712] [2021-01-06 17:04:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:56,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:56,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:56,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090702778] [2021-01-06 17:04:56,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:56,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:56,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:56,843 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:57,127 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-01-06 17:04:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:57,128 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:57,128 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:04:57,129 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 17:04:57,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 17:04:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-01-06 17:04:57,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:04:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-01-06 17:04:57,244 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 22 [2021-01-06 17:04:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:57,244 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-01-06 17:04:57,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-01-06 17:04:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:57,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:57,245 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:57,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:57,446 INFO L429 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2131891729, now seen corresponding path program 356 times [2021-01-06 17:04:57,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:57,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701927330] [2021-01-06 17:04:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:57,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701927330] [2021-01-06 17:04:57,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404043432] [2021-01-06 17:04:57,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:57,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:57,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:57,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:57,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:57,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:57,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:57,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148299459] [2021-01-06 17:04:57,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:57,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:57,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:57,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:57,806 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 21 states. [2021-01-06 17:04:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:58,109 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:04:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:58,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:58,110 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:04:58,111 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:04:58,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:04:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-01-06 17:04:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:04:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-01-06 17:04:58,232 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 22 [2021-01-06 17:04:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:58,232 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-01-06 17:04:58,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-01-06 17:04:58,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:58,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:58,232 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:58,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:58,433 INFO L429 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044687, now seen corresponding path program 357 times [2021-01-06 17:04:58,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:58,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557440710] [2021-01-06 17:04:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:58,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557440710] [2021-01-06 17:04:58,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17034123] [2021-01-06 17:04:58,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:58,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:04:58,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:58,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:58,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:58,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:58,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382821517] [2021-01-06 17:04:58,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:58,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:58,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:58,805 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand 21 states. [2021-01-06 17:04:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:59,118 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-01-06 17:04:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:59,119 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 17:04:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:59,119 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:04:59,119 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:04:59,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:04:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-01-06 17:04:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:04:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-01-06 17:04:59,240 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 22 [2021-01-06 17:04:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:59,240 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-01-06 17:04:59,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-01-06 17:04:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:04:59,240 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:59,240 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:59,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:59,441 INFO L429 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash 356884367, now seen corresponding path program 358 times [2021-01-06 17:04:59,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:59,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730416355] [2021-01-06 17:04:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:59,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730416355] [2021-01-06 17:04:59,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743782365] [2021-01-06 17:04:59,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:59,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:59,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:59,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:04:59,592 INFO L286 TraceCheckSpWp]: Computing forward predicates...