/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/array-cav19/array_init_var_plus_ind2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:02:39,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:02:39,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:02:39,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:02:39,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:02:39,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:02:39,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:02:39,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:02:39,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:02:39,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:02:39,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:02:39,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:02:39,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:02:39,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:02:39,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:02:39,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:02:39,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:02:39,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:02:39,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:02:39,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:02:39,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:02:39,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:02:39,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:02:39,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:02:39,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:02:39,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:02:39,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:02:39,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:02:39,425 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 11:02:39,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:02:39,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:02:39,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:02:39,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:02:39,496 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:02:39,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:02:39,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:02:39,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:02:39,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:02:39,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:02:39,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:02:39,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:02:39,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:02:39,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:02:39,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:02:39,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:02:39,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:02:39,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:02:39,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:02:39,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:02:39,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:02:39,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:02:39,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:02:39,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:02:39,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:02:39,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:02:39,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:02:39,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:02:39,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:02:39,972 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:02:39,973 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:02:39,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2021-01-06 11:02:40,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e0bfbf46/b5c7af61811b47efb5e140c0a837a1ac/FLAG73def9266 [2021-01-06 11:02:40,844 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:02:40,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2021-01-06 11:02:40,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e0bfbf46/b5c7af61811b47efb5e140c0a837a1ac/FLAG73def9266 [2021-01-06 11:02:41,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e0bfbf46/b5c7af61811b47efb5e140c0a837a1ac [2021-01-06 11:02:41,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:02:41,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:02:41,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:02:41,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:02:41,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:02:41,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e94e71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41, skipping insertion in model container [2021-01-06 11:02:41,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:02:41,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:02:41,387 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/array-cav19/array_init_var_plus_ind2.c[415,428] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 11:02:41,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:02:41,421 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:02:41,439 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/array-cav19/array_init_var_plus_ind2.c[415,428] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 11:02:41,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:02:41,467 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:02:41,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41 WrapperNode [2021-01-06 11:02:41,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:02:41,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:02:41,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:02:41,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:02:41,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:02:41,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:02:41,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:02:41,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:02:41,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (1/1) ... [2021-01-06 11:02:41,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:02:41,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:02:41,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:02:41,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:02:41,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (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 11:02:41,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:02:41,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:02:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:02:41,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:02:41,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:02:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:02:41,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:02:42,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:02:42,044 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 11:02:42,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:02:42 BoogieIcfgContainer [2021-01-06 11:02:42,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:02:42,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:02:42,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:02:42,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:02:42,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:02:41" (1/3) ... [2021-01-06 11:02:42,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285c2bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:02:42, skipping insertion in model container [2021-01-06 11:02:42,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:02:41" (2/3) ... [2021-01-06 11:02:42,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285c2bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:02:42, skipping insertion in model container [2021-01-06 11:02:42,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:02:42" (3/3) ... [2021-01-06 11:02:42,082 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2021-01-06 11:02:42,100 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:02:42,110 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:02:42,135 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:02:42,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:02:42,195 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:02:42,196 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:02:42,196 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:02:42,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:02:42,196 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:02:42,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:02:42,197 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:02:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 11:02:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 11:02:42,224 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:42,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:42,226 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-01-06 11:02:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:42,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210927533] [2021-01-06 11:02:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:42,539 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 11:02:42,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210927533] [2021-01-06 11:02:42,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:02:42,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:02:42,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671594472] [2021-01-06 11:02:42,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:02:42,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:42,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:02:42,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:02:42,586 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-01-06 11:02:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:42,608 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-01-06 11:02:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:02:42,610 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 11:02:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:42,641 INFO L225 Difference]: With dead ends: 27 [2021-01-06 11:02:42,641 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 11:02:42,653 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 11:02:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 11:02:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 11:02:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 11:02:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 11:02:42,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-01-06 11:02:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:42,699 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 11:02:42,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:02:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 11:02:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 11:02:42,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:42,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:42,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:02:42,703 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-01-06 11:02:42,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:42,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531269765] [2021-01-06 11:02:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:42,854 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 11:02:42,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531269765] [2021-01-06 11:02:42,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:02:42,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:02:42,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657099667] [2021-01-06 11:02:42,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:02:42,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:02:42,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:02:42,861 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2021-01-06 11:02:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:42,940 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-01-06 11:02:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:02:42,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-01-06 11:02:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:42,943 INFO L225 Difference]: With dead ends: 29 [2021-01-06 11:02:42,943 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 11:02:42,946 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 11:02:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 11:02:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-01-06 11:02:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 11:02:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-01-06 11:02:42,957 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-01-06 11:02:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:42,959 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-01-06 11:02:42,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:02:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-01-06 11:02:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 11:02:42,962 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:42,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:42,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:02:42,964 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-01-06 11:02:42,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:42,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242028705] [2021-01-06 11:02:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:43,073 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 11:02:43,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242028705] [2021-01-06 11:02:43,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:02:43,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:02:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513756432] [2021-01-06 11:02:43,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:02:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:02:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:02:43,078 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2021-01-06 11:02:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:43,118 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-01-06 11:02:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:02:43,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-06 11:02:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:43,121 INFO L225 Difference]: With dead ends: 23 [2021-01-06 11:02:43,122 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 11:02:43,126 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 11:02:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 11:02:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 11:02:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 11:02:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 11:02:43,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-01-06 11:02:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:43,138 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 11:02:43,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:02:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 11:02:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 11:02:43,139 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:43,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:43,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:02:43,140 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-01-06 11:02:43,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:43,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288545776] [2021-01-06 11:02:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:43,224 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 11:02:43,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288545776] [2021-01-06 11:02:43,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555436400] [2021-01-06 11:02:43,225 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 11:02:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:02:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:43,396 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 11:02:43,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:43,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-01-06 11:02:43,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044896322] [2021-01-06 11:02:43,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:02:43,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:43,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:02:43,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:02:43,400 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2021-01-06 11:02:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:43,484 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-01-06 11:02:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:02:43,484 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-01-06 11:02:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:43,485 INFO L225 Difference]: With dead ends: 27 [2021-01-06 11:02:43,485 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 11:02:43,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:02:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 11:02:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 11:02:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:02:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 11:02:43,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-01-06 11:02:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:43,499 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 11:02:43,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:02:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 11:02:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:02:43,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:43,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:43,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:43,718 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 818898063, now seen corresponding path program 2 times [2021-01-06 11:02:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:43,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396587544] [2021-01-06 11:02:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:43,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396587544] [2021-01-06 11:02:43,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299340834] [2021-01-06 11:02:43,835 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 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 11:02:43,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:43,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:02:43,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:43,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:43,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 11:02:43,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831367022] [2021-01-06 11:02:43,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:02:43,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:02:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:02:43,997 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2021-01-06 11:02:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:44,088 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-01-06 11:02:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:02:44,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 11:02:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:44,092 INFO L225 Difference]: With dead ends: 35 [2021-01-06 11:02:44,092 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 11:02:44,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 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 11:02:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 11:02:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-01-06 11:02:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 11:02:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 11:02:44,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-01-06 11:02:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:44,106 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 11:02:44,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:02:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 11:02:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:02:44,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:44,108 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:44,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:44,310 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:44,311 INFO L82 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2021-01-06 11:02:44,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:44,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833441178] [2021-01-06 11:02:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:44,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833441178] [2021-01-06 11:02:44,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163047576] [2021-01-06 11:02:44,511 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 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 11:02:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:44,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:02:44,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:44,710 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:02:44,712 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:44,720 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:44,722 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:44,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:02:44,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:44,799 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:44,803 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:44,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:44,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 11:02:44,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131349524] [2021-01-06 11:02:44,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:02:44,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:02:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:02:44,828 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 14 states. [2021-01-06 11:02:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:45,026 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-01-06 11:02:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:02:45,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2021-01-06 11:02:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:45,027 INFO L225 Difference]: With dead ends: 35 [2021-01-06 11:02:45,028 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 11:02:45,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:02:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 11:02:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-01-06 11:02:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:02:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 11:02:45,035 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-01-06 11:02:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:45,036 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 11:02:45,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:02:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 11:02:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:02:45,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:45,037 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:45,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:45,242 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1827520567, now seen corresponding path program 3 times [2021-01-06 11:02:45,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:45,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209800136] [2021-01-06 11:02:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:45,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209800136] [2021-01-06 11:02:45,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476574882] [2021-01-06 11:02:45,316 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 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 11:02:45,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:02:45,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:45,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:02:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:45,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:45,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 11:02:45,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156272696] [2021-01-06 11:02:45,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:02:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:02:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:02:45,483 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2021-01-06 11:02:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:45,537 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-01-06 11:02:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:02:45,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 11:02:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:45,538 INFO L225 Difference]: With dead ends: 47 [2021-01-06 11:02:45,538 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:02:45,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 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 11:02:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:02:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-01-06 11:02:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 11:02:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 11:02:45,546 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-01-06 11:02:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:45,546 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 11:02:45,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:02:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 11:02:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:02:45,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:45,548 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:45,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:45,761 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2021-01-06 11:02:45,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:45,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100030087] [2021-01-06 11:02:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:45,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100030087] [2021-01-06 11:02:45,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294682510] [2021-01-06 11:02:45,952 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 11:02:46,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:46,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:46,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 11:02:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:46,105 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:46,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:46,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:46,121 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:46,121 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 11:02:46,219 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:46,219 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:02:46,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:46,225 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:46,249 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:02:46,252 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:46,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:02:46,321 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:46,324 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:46,328 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:46,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:46,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-01-06 11:02:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723817247] [2021-01-06 11:02:46,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:02:46,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:02:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:02:46,360 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 17 states. [2021-01-06 11:02:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:46,785 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-01-06 11:02:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:02:46,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2021-01-06 11:02:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:46,786 INFO L225 Difference]: With dead ends: 38 [2021-01-06 11:02:46,786 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 11:02:46,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:02:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 11:02:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-01-06 11:02:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:02:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 11:02:46,792 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-01-06 11:02:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:46,793 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 11:02:46,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:02:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 11:02:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:02:46,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:46,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:47,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:47,010 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2021-01-06 11:02:47,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:47,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159854999] [2021-01-06 11:02:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:47,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159854999] [2021-01-06 11:02:47,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524272310] [2021-01-06 11:02:47,080 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 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 11:02:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:02:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:47,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:47,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:02:47,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125771382] [2021-01-06 11:02:47,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:02:47,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:47,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:02:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:02:47,214 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2021-01-06 11:02:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:47,269 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-01-06 11:02:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:02:47,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 11:02:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:47,271 INFO L225 Difference]: With dead ends: 36 [2021-01-06 11:02:47,271 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 11:02:47,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:02:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 11:02:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 11:02:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:02:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 11:02:47,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-01-06 11:02:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:47,276 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 11:02:47,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:02:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 11:02:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:02:47,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:47,277 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:47,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:47,492 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2021-01-06 11:02:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:47,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893497551] [2021-01-06 11:02:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:47,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893497551] [2021-01-06 11:02:47,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358312491] [2021-01-06 11:02:47,725 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 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 11:02:47,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:47,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 11:02:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:47,976 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:47,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:47,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:47,989 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:47,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 11:02:48,239 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:48,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:48,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:48,255 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:02:48,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:02:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:48,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:48,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-01-06 11:02:48,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516741164] [2021-01-06 11:02:48,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:02:48,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:02:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:02:48,302 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 22 states. [2021-01-06 11:02:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:48,691 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-01-06 11:02:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:02:48,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2021-01-06 11:02:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:48,693 INFO L225 Difference]: With dead ends: 37 [2021-01-06 11:02:48,693 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 11:02:48,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:02:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 11:02:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-01-06 11:02:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 11:02:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 11:02:48,698 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2021-01-06 11:02:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:48,699 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 11:02:48,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:02:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 11:02:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:02:48,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:48,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:48,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:02:48,914 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:48,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1605494661, now seen corresponding path program 1 times [2021-01-06 11:02:48,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:48,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069389450] [2021-01-06 11:02:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:02:49,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069389450] [2021-01-06 11:02:49,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944652005] [2021-01-06 11:02:49,028 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 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 11:02:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:02:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:02:49,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:49,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 11:02:49,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260381368] [2021-01-06 11:02:49,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:02:49,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:02:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:02:49,202 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2021-01-06 11:02:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:49,273 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-01-06 11:02:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:02:49,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2021-01-06 11:02:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:49,277 INFO L225 Difference]: With dead ends: 47 [2021-01-06 11:02:49,277 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 11:02:49,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 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 11:02:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 11:02:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-01-06 11:02:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 11:02:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-01-06 11:02:49,295 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2021-01-06 11:02:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:49,298 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-01-06 11:02:49,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:02:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-01-06 11:02:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:02:49,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:49,300 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:49,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 11:02:49,516 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:49,517 INFO L82 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2021-01-06 11:02:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:49,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989473984] [2021-01-06 11:02:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:49,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989473984] [2021-01-06 11:02:49,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830524548] [2021-01-06 11:02:49,897 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 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 11:02:49,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 11:02:49,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 11:02:49,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:50,136 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:50,143 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:50,153 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:50,155 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:50,155 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-01-06 11:02:50,305 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:50,306 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:02:50,309 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:50,313 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:50,347 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:02:50,359 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:50,360 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:02:50,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:50,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:50,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:50,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:50,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-01-06 11:02:50,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151649085] [2021-01-06 11:02:50,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:02:50,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:50,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:02:50,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:02:50,627 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 24 states. [2021-01-06 11:02:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:51,358 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-01-06 11:02:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:02:51,359 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2021-01-06 11:02:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:51,360 INFO L225 Difference]: With dead ends: 36 [2021-01-06 11:02:51,360 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:02:51,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:02:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:02:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-01-06 11:02:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 11:02:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-01-06 11:02:51,376 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-01-06 11:02:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:51,377 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-01-06 11:02:51,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:02:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-01-06 11:02:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 11:02:51,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:51,381 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:51,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:51,596 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 4 times [2021-01-06 11:02:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:51,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227207584] [2021-01-06 11:02:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:52,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227207584] [2021-01-06 11:02:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190851398] [2021-01-06 11:02:52,062 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 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 11:02:52,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:02:52,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 11:02:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:52,365 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:02:52,366 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:52,372 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:52,374 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:52,374 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:02:52,592 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:52,597 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:52,600 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:52,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:52,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-01-06 11:02:52,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724673572] [2021-01-06 11:02:52,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:02:52,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:02:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:02:52,640 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 27 states. [2021-01-06 11:02:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:53,701 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-01-06 11:02:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:02:53,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2021-01-06 11:02:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:53,702 INFO L225 Difference]: With dead ends: 54 [2021-01-06 11:02:53,702 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 11:02:53,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 11:02:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 11:02:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-01-06 11:02:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 11:02:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-01-06 11:02:53,710 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 28 [2021-01-06 11:02:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:53,711 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-01-06 11:02:53,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:02:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-01-06 11:02:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 11:02:53,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:53,712 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:53,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:53,926 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:53,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1022889845, now seen corresponding path program 2 times [2021-01-06 11:02:53,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:53,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045198925] [2021-01-06 11:02:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:02:54,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045198925] [2021-01-06 11:02:54,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270690386] [2021-01-06 11:02:54,033 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 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 11:02:54,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:02:54,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:54,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:02:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:02:54,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:54,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 11:02:54,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296691875] [2021-01-06 11:02:54,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:02:54,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:02:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:02:54,243 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 15 states. [2021-01-06 11:02:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:54,333 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-01-06 11:02:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:02:54,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2021-01-06 11:02:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:54,335 INFO L225 Difference]: With dead ends: 79 [2021-01-06 11:02:54,335 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 11:02:54,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 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 11:02:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 11:02:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2021-01-06 11:02:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 11:02:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-01-06 11:02:54,342 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 30 [2021-01-06 11:02:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:54,342 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-01-06 11:02:54,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:02:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-01-06 11:02:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:02:54,343 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:54,343 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:54,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:02:54,559 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:54,560 INFO L82 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 5 times [2021-01-06 11:02:54,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:54,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127197476] [2021-01-06 11:02:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127197476] [2021-01-06 11:02:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638124441] [2021-01-06 11:02:55,037 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 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 11:02:55,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:02:55,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 11:02:55,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:55,382 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:02:55,383 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:55,393 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:55,394 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:55,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-01-06 11:02:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:02:55,479 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-01-06 11:02:55,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:55,493 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:55,495 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:55,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:18 [2021-01-06 11:02:55,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:55,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:55,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:55,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:55,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-01-06 11:02:55,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442475317] [2021-01-06 11:02:55,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 11:02:55,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:55,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 11:02:55,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-01-06 11:02:55,826 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 30 states. [2021-01-06 11:02:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:56,676 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-01-06 11:02:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:02:56,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 31 [2021-01-06 11:02:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:56,678 INFO L225 Difference]: With dead ends: 60 [2021-01-06 11:02:56,678 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 11:02:56,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 11:02:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 11:02:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2021-01-06 11:02:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 11:02:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-01-06 11:02:56,687 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2021-01-06 11:02:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:56,687 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-01-06 11:02:56,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 11:02:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-01-06 11:02:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:02:56,688 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:56,688 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:56,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:02:56,894 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1640133522, now seen corresponding path program 6 times [2021-01-06 11:02:56,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:56,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056971144] [2021-01-06 11:02:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:57,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056971144] [2021-01-06 11:02:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264158830] [2021-01-06 11:02:57,005 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 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 11:02:57,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 11:02:57,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:57,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:02:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:57,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:57,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 11:02:57,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156381416] [2021-01-06 11:02:57,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:02:57,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:57,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:02:57,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:02:57,213 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 16 states. [2021-01-06 11:02:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:57,288 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-01-06 11:02:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:02:57,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2021-01-06 11:02:57,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:57,290 INFO L225 Difference]: With dead ends: 58 [2021-01-06 11:02:57,290 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 11:02:57,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:02:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 11:02:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 11:02:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 11:02:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 11:02:57,296 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2021-01-06 11:02:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:57,296 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 11:02:57,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:02:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 11:02:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 11:02:57,297 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:57,297 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:57,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:02:57,511 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 7 times [2021-01-06 11:02:57,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:57,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113431335] [2021-01-06 11:02:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:57,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113431335] [2021-01-06 11:02:57,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520401099] [2021-01-06 11:02:57,960 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 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 11:02:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 11:02:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:58,397 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:02:58,398 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:02:58,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:02:58,408 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:02:58,408 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:02:58,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:58,744 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:58,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:02:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:02:58,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:58,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-01-06 11:02:58,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492466236] [2021-01-06 11:02:58,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 11:02:58,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 11:02:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:02:58,791 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 33 states. [2021-01-06 11:02:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:59,971 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-01-06 11:02:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 11:02:59,971 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2021-01-06 11:02:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:59,972 INFO L225 Difference]: With dead ends: 63 [2021-01-06 11:02:59,973 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:02:59,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 11:02:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:02:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 11:02:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 11:02:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 11:02:59,981 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2021-01-06 11:02:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:59,981 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 11:02:59,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 11:02:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 11:02:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 11:02:59,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:59,982 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:00,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:00,196 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:00,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1080336719, now seen corresponding path program 3 times [2021-01-06 11:03:00,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:00,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419869350] [2021-01-06 11:03:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 11:03:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419869350] [2021-01-06 11:03:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203381163] [2021-01-06 11:03:00,293 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 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 11:03:00,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 11:03:00,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:03:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 11:03:00,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:00,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 11:03:00,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847214089] [2021-01-06 11:03:00,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:03:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:00,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:03:00,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:03:00,546 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 17 states. [2021-01-06 11:03:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:00,633 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-01-06 11:03:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:03:00,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2021-01-06 11:03:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:00,634 INFO L225 Difference]: With dead ends: 77 [2021-01-06 11:03:00,635 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 11:03:00,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 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 11:03:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 11:03:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-01-06 11:03:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 11:03:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-01-06 11:03:00,641 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2021-01-06 11:03:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:00,641 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-01-06 11:03:00,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:03:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-01-06 11:03:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:03:00,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:00,642 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:00,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:03:00,856 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 8 times [2021-01-06 11:03:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:00,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555114133] [2021-01-06 11:03:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555114133] [2021-01-06 11:03:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946572096] [2021-01-06 11:03:01,325 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 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 11:03:01,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:03:01,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:01,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 11:03:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:01,792 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:01,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:01,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:01,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:01,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-01-06 11:03:01,925 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:01,926 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:03:01,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:01,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:01,957 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:03:01,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:01,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:03:02,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:02,336 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:02,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:02,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:02,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-01-06 11:03:02,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984580395] [2021-01-06 11:03:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 11:03:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 11:03:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:03:02,390 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 36 states. [2021-01-06 11:03:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:03,499 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-01-06 11:03:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 11:03:03,500 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2021-01-06 11:03:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:03,501 INFO L225 Difference]: With dead ends: 50 [2021-01-06 11:03:03,501 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:03:03,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 11:03:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:03:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-01-06 11:03:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:03:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 11:03:03,509 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2021-01-06 11:03:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:03,509 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 11:03:03,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 11:03:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 11:03:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 11:03:03,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:03,510 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:03,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:03,725 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 9 times [2021-01-06 11:03:03,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:03,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663740929] [2021-01-06 11:03:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663740929] [2021-01-06 11:03:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284449495] [2021-01-06 11:03:04,211 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 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 11:03:04,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 11:03:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 11:03:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:04,845 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:04,846 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:04,854 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:04,856 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:04,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-01-06 11:03:05,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:05,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:05,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:05,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:03:05,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:03:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:05,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:05,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-01-06 11:03:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477169067] [2021-01-06 11:03:05,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 11:03:05,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 11:03:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:03:05,469 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 40 states. [2021-01-06 11:03:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:06,826 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-01-06 11:03:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:03:06,826 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2021-01-06 11:03:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:06,827 INFO L225 Difference]: With dead ends: 70 [2021-01-06 11:03:06,827 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 11:03:06,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 11:03:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 11:03:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 11:03:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 11:03:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 11:03:06,834 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2021-01-06 11:03:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:06,834 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 11:03:06,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 11:03:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 11:03:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:03:06,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:06,835 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:07,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:07,050 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:07,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1187871967, now seen corresponding path program 4 times [2021-01-06 11:03:07,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:07,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168087568] [2021-01-06 11:03:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 11:03:07,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168087568] [2021-01-06 11:03:07,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720014496] [2021-01-06 11:03:07,164 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 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 11:03:07,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:03:07,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 11:03:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:07,487 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:07,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:07,496 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:07,498 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:07,498 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2021-01-06 11:03:07,601 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:07,601 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:03:07,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:07,605 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:07,628 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:03:07,630 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:07,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:03:07,944 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:07,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:07,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:07,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:07,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 31 [2021-01-06 11:03:07,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794655023] [2021-01-06 11:03:07,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:03:07,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:03:07,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:03:07,996 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 31 states. [2021-01-06 11:03:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:10,336 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-01-06 11:03:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 11:03:10,337 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2021-01-06 11:03:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:10,338 INFO L225 Difference]: With dead ends: 106 [2021-01-06 11:03:10,338 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 11:03:10,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=443, Invalid=3847, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 11:03:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 11:03:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2021-01-06 11:03:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:03:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 11:03:10,347 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2021-01-06 11:03:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:10,348 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 11:03:10,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:03:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 11:03:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:03:10,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:10,349 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:10,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:03:10,563 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash -707076540, now seen corresponding path program 10 times [2021-01-06 11:03:10,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:10,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871855143] [2021-01-06 11:03:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:11,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871855143] [2021-01-06 11:03:11,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787350119] [2021-01-06 11:03:11,163 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 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 11:03:11,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:03:11,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 11:03:11,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:11,893 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:11,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:11,901 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:11,903 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:11,903 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:03:12,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:12,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:12,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:12,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:12,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-01-06 11:03:12,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875072619] [2021-01-06 11:03:12,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 11:03:12,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:12,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 11:03:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 11:03:12,535 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 45 states. [2021-01-06 11:03:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:13,720 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-01-06 11:03:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 11:03:13,721 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2021-01-06 11:03:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:13,721 INFO L225 Difference]: With dead ends: 87 [2021-01-06 11:03:13,722 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 11:03:13,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=2846, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 11:03:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 11:03:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-01-06 11:03:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 11:03:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-01-06 11:03:13,731 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2021-01-06 11:03:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:13,732 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-01-06 11:03:13,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 11:03:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-01-06 11:03:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:03:13,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:13,733 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:13,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:13,943 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:13,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1660279261, now seen corresponding path program 5 times [2021-01-06 11:03:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:13,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91351783] [2021-01-06 11:03:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 11:03:14,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91351783] [2021-01-06 11:03:14,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233789284] [2021-01-06 11:03:14,083 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 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 11:03:14,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 11:03:14,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:03:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 11:03:14,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:14,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 11:03:14,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953439035] [2021-01-06 11:03:14,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:03:14,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:14,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:03:14,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:03:14,422 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 21 states. [2021-01-06 11:03:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:14,546 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-01-06 11:03:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:03:14,547 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2021-01-06 11:03:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:14,548 INFO L225 Difference]: With dead ends: 136 [2021-01-06 11:03:14,548 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 11:03:14,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 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 11:03:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 11:03:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 60. [2021-01-06 11:03:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 11:03:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-01-06 11:03:14,557 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 51 [2021-01-06 11:03:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:14,557 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-01-06 11:03:14,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:03:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-01-06 11:03:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 11:03:14,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:14,558 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:14,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 11:03:14,772 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash -988666754, now seen corresponding path program 11 times [2021-01-06 11:03:14,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:14,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685944412] [2021-01-06 11:03:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:15,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685944412] [2021-01-06 11:03:15,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704665726] [2021-01-06 11:03:15,426 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 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 11:03:15,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 11:03:15,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 11:03:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:16,281 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:16,282 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:16,290 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:16,292 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:16,292 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-01-06 11:03:16,449 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:16,449 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:03:16,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:16,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:16,476 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:03:16,478 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:16,478 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:03:17,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:17,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:17,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:17,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:17,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-01-06 11:03:17,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331630651] [2021-01-06 11:03:17,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 11:03:17,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 11:03:17,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2107, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 11:03:17,162 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 48 states. [2021-01-06 11:03:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:18,975 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-01-06 11:03:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 11:03:18,976 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2021-01-06 11:03:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:18,977 INFO L225 Difference]: With dead ends: 93 [2021-01-06 11:03:18,977 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 11:03:18,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=357, Invalid=4065, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 11:03:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 11:03:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2021-01-06 11:03:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 11:03:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-01-06 11:03:18,986 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2021-01-06 11:03:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:18,987 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-01-06 11:03:18,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 11:03:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-01-06 11:03:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:03:18,987 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:18,988 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:19,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 11:03:19,204 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1646534406, now seen corresponding path program 12 times [2021-01-06 11:03:19,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:19,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958513395] [2021-01-06 11:03:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 51 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958513395] [2021-01-06 11:03:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65895509] [2021-01-06 11:03:19,398 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 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 11:03:19,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 11:03:19,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:19,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:03:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 72 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:19,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:19,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-01-06 11:03:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354531439] [2021-01-06 11:03:19,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:03:19,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:03:19,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:03:19,886 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 25 states. [2021-01-06 11:03:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:20,063 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-01-06 11:03:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:03:20,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2021-01-06 11:03:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:20,064 INFO L225 Difference]: With dead ends: 91 [2021-01-06 11:03:20,064 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 11:03:20,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:03:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 11:03:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 11:03:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 11:03:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-01-06 11:03:20,075 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2021-01-06 11:03:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:20,075 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-01-06 11:03:20,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:03:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-01-06 11:03:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 11:03:20,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:20,076 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:20,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:20,290 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash -147752396, now seen corresponding path program 13 times [2021-01-06 11:03:20,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:20,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636349492] [2021-01-06 11:03:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:21,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636349492] [2021-01-06 11:03:21,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343133276] [2021-01-06 11:03:21,021 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 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 11:03:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 11:03:21,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:22,013 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:22,014 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:22,021 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:22,022 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:22,022 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:03:22,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:22,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:22,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:22,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:22,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-01-06 11:03:22,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461527537] [2021-01-06 11:03:22,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 11:03:22,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 11:03:22,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2388, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 11:03:22,814 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 51 states. [2021-01-06 11:03:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:24,202 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-01-06 11:03:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 11:03:24,202 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 56 [2021-01-06 11:03:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:24,203 INFO L225 Difference]: With dead ends: 98 [2021-01-06 11:03:24,203 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 11:03:24,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 11:03:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 11:03:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2021-01-06 11:03:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 11:03:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-01-06 11:03:24,218 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 56 [2021-01-06 11:03:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:24,218 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-01-06 11:03:24,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 11:03:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-01-06 11:03:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 11:03:24,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:24,219 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:24,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 11:03:24,434 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1103207117, now seen corresponding path program 6 times [2021-01-06 11:03:24,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:24,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945813495] [2021-01-06 11:03:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 11:03:24,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945813495] [2021-01-06 11:03:24,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106790643] [2021-01-06 11:03:24,577 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 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 11:03:24,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 11:03:24,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:03:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 11:03:25,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:25,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-01-06 11:03:25,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112617215] [2021-01-06 11:03:25,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 11:03:25,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 11:03:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:03:25,185 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2021-01-06 11:03:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:25,312 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2021-01-06 11:03:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:03:25,313 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2021-01-06 11:03:25,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:25,315 INFO L225 Difference]: With dead ends: 155 [2021-01-06 11:03:25,315 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 11:03:25,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:03:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 11:03:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 67. [2021-01-06 11:03:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 11:03:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-01-06 11:03:25,331 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 58 [2021-01-06 11:03:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:25,331 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-01-06 11:03:25,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 11:03:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-01-06 11:03:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 11:03:25,332 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:25,332 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:25,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:25,547 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash -412901702, now seen corresponding path program 14 times [2021-01-06 11:03:25,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:25,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666706488] [2021-01-06 11:03:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:26,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666706488] [2021-01-06 11:03:26,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877062588] [2021-01-06 11:03:26,411 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 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 11:03:26,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:03:26,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 11:03:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:27,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:27,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:27,464 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:27,465 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:27,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 11:03:27,622 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:27,623 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:03:27,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:27,626 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:27,651 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:03:27,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:27,652 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:03:28,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:28,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:28,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:28,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:28,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-01-06 11:03:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768545921] [2021-01-06 11:03:28,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 11:03:28,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:28,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 11:03:28,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2693, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 11:03:28,551 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 54 states. [2021-01-06 11:03:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:30,640 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2021-01-06 11:03:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 11:03:30,641 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 59 [2021-01-06 11:03:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:30,641 INFO L225 Difference]: With dead ends: 104 [2021-01-06 11:03:30,641 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 11:03:30,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=397, Invalid=5153, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 11:03:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 11:03:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2021-01-06 11:03:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 11:03:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-01-06 11:03:30,653 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2021-01-06 11:03:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:30,653 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-01-06 11:03:30,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 11:03:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-01-06 11:03:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 11:03:30,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:30,654 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:30,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 11:03:30,868 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1180498710, now seen corresponding path program 15 times [2021-01-06 11:03:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:30,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661110268] [2021-01-06 11:03:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 73 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:31,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661110268] [2021-01-06 11:03:31,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745785655] [2021-01-06 11:03:31,113 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 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 11:03:31,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 11:03:31,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:03:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 98 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:31,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:31,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-01-06 11:03:31,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721881707] [2021-01-06 11:03:31,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 11:03:31,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 11:03:31,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:03:31,637 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 28 states. [2021-01-06 11:03:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:31,879 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2021-01-06 11:03:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:03:31,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2021-01-06 11:03:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:31,884 INFO L225 Difference]: With dead ends: 102 [2021-01-06 11:03:31,884 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 11:03:31,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:03:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 11:03:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 11:03:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 11:03:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 11:03:31,897 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2021-01-06 11:03:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:31,898 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 11:03:31,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 11:03:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 11:03:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 11:03:31,898 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:31,898 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:32,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 11:03:32,114 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:32,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1132689008, now seen corresponding path program 16 times [2021-01-06 11:03:32,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:32,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992302370] [2021-01-06 11:03:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:33,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992302370] [2021-01-06 11:03:33,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318850534] [2021-01-06 11:03:33,017 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 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 11:03:33,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:03:33,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 11:03:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:34,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:34,218 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:34,225 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:34,226 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:34,227 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:03:35,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:35,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:35,113 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:35,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:35,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-01-06 11:03:35,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884134951] [2021-01-06 11:03:35,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 11:03:35,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 11:03:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3010, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 11:03:35,214 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 57 states. [2021-01-06 11:03:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:36,956 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2021-01-06 11:03:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 11:03:36,957 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 63 [2021-01-06 11:03:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:36,958 INFO L225 Difference]: With dead ends: 109 [2021-01-06 11:03:36,958 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 11:03:36,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=290, Invalid=4540, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 11:03:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 11:03:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2021-01-06 11:03:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 11:03:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-01-06 11:03:36,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 63 [2021-01-06 11:03:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:36,973 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-01-06 11:03:36,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 11:03:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-01-06 11:03:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 11:03:36,973 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:36,973 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:37,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:37,175 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1692837623, now seen corresponding path program 7 times [2021-01-06 11:03:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:37,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226735144] [2021-01-06 11:03:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 11:03:37,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226735144] [2021-01-06 11:03:37,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528997466] [2021-01-06 11:03:37,369 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 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 11:03:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:37,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:03:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 11:03:37,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:37,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-01-06 11:03:37,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181851207] [2021-01-06 11:03:37,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:03:37,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:03:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:03:37,757 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 25 states. [2021-01-06 11:03:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:37,907 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2021-01-06 11:03:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:03:37,908 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2021-01-06 11:03:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:37,909 INFO L225 Difference]: With dead ends: 174 [2021-01-06 11:03:37,909 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 11:03:37,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:03:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 11:03:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 74. [2021-01-06 11:03:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 11:03:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-01-06 11:03:37,921 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 65 [2021-01-06 11:03:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:37,921 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-01-06 11:03:37,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:03:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-01-06 11:03:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 11:03:37,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:37,922 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:38,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:38,130 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash 557731626, now seen corresponding path program 17 times [2021-01-06 11:03:38,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:38,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276199602] [2021-01-06 11:03:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:39,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276199602] [2021-01-06 11:03:39,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596003241] [2021-01-06 11:03:39,129 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 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 11:03:39,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 11:03:39,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 11:03:39,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:40,487 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:40,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:40,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:40,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:40,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 11:03:40,685 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:40,686 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:03:40,687 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:40,688 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:40,716 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:03:40,717 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:40,718 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:03:41,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:41,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:41,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:41,593 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:41,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:41,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 59 [2021-01-06 11:03:41,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341460453] [2021-01-06 11:03:41,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 11:03:41,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 11:03:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3239, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 11:03:41,684 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 59 states. [2021-01-06 11:03:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:44,384 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-01-06 11:03:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 11:03:44,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2021-01-06 11:03:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:44,387 INFO L225 Difference]: With dead ends: 115 [2021-01-06 11:03:44,387 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 11:03:44,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=402, Invalid=5918, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 11:03:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 11:03:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 73. [2021-01-06 11:03:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 11:03:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-01-06 11:03:44,400 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2021-01-06 11:03:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:44,401 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-01-06 11:03:44,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 11:03:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-01-06 11:03:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 11:03:44,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:44,401 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:44,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 11:03:44,602 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:44,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1474593574, now seen corresponding path program 18 times [2021-01-06 11:03:44,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:44,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047543962] [2021-01-06 11:03:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 99 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047543962] [2021-01-06 11:03:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816848981] [2021-01-06 11:03:44,956 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 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 11:03:45,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 11:03:45,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:03:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 128 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:45,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:45,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-01-06 11:03:45,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137813338] [2021-01-06 11:03:45,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:03:45,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:03:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:03:45,752 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 31 states. [2021-01-06 11:03:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:46,038 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2021-01-06 11:03:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:03:46,039 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2021-01-06 11:03:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:46,040 INFO L225 Difference]: With dead ends: 113 [2021-01-06 11:03:46,040 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 11:03:46,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:03:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 11:03:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 11:03:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 11:03:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-01-06 11:03:46,055 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2021-01-06 11:03:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:46,055 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-01-06 11:03:46,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:03:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-01-06 11:03:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 11:03:46,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:46,056 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:46,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:46,270 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:46,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1229951264, now seen corresponding path program 19 times [2021-01-06 11:03:46,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:46,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270075632] [2021-01-06 11:03:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270075632] [2021-01-06 11:03:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103568413] [2021-01-06 11:03:47,533 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 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 11:03:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:47,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 11:03:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:49,117 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:03:49,118 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:49,126 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:49,128 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:49,128 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:03:50,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:50,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:50,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:50,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:50,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 63 [2021-01-06 11:03:50,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103392714] [2021-01-06 11:03:50,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 11:03:50,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 11:03:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3704, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 11:03:50,376 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 63 states. [2021-01-06 11:03:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:52,495 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2021-01-06 11:03:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 11:03:52,495 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2021-01-06 11:03:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:52,496 INFO L225 Difference]: With dead ends: 120 [2021-01-06 11:03:52,497 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 11:03:52,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=318, Invalid=5534, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 11:03:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 11:03:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-01-06 11:03:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 11:03:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-01-06 11:03:52,515 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 70 [2021-01-06 11:03:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:52,515 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-01-06 11:03:52,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 11:03:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-01-06 11:03:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 11:03:52,515 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:52,516 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:52,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 11:03:52,721 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash 832919161, now seen corresponding path program 8 times [2021-01-06 11:03:52,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:52,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030190694] [2021-01-06 11:03:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 11:03:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030190694] [2021-01-06 11:03:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844671624] [2021-01-06 11:03:52,975 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 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 11:03:53,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:03:53,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:53,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:03:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 11:03:53,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:53,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-01-06 11:03:53,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043082300] [2021-01-06 11:03:53,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:03:53,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:03:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:03:53,540 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 27 states. [2021-01-06 11:03:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:53,776 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2021-01-06 11:03:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:03:53,778 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2021-01-06 11:03:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:53,779 INFO L225 Difference]: With dead ends: 193 [2021-01-06 11:03:53,779 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 11:03:53,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:03:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 11:03:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 81. [2021-01-06 11:03:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 11:03:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-01-06 11:03:53,799 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 72 [2021-01-06 11:03:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:53,800 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-01-06 11:03:53,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:03:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-01-06 11:03:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 11:03:53,800 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:53,801 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:54,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 11:03:54,015 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1261252838, now seen corresponding path program 20 times [2021-01-06 11:03:54,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:54,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023227098] [2021-01-06 11:03:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:55,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023227098] [2021-01-06 11:03:55,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720665607] [2021-01-06 11:03:55,296 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 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 11:03:55,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:03:55,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 11:03:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:56,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:03:56,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:57,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:57,010 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:57,011 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 11:03:57,236 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:57,236 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:03:57,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:57,245 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:57,279 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:03:57,281 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:03:57,281 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:03:58,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:58,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:58,551 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:03:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:58,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:58,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-01-06 11:03:58,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646244935] [2021-01-06 11:03:58,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 11:03:58,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 11:03:58,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4081, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 11:03:58,663 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 66 states. [2021-01-06 11:04:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:01,966 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2021-01-06 11:04:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 11:04:01,966 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2021-01-06 11:04:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:01,968 INFO L225 Difference]: With dead ends: 126 [2021-01-06 11:04:01,968 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 11:04:01,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=481, Invalid=7709, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 11:04:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 11:04:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 80. [2021-01-06 11:04:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 11:04:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-01-06 11:04:01,988 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2021-01-06 11:04:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:01,989 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-01-06 11:04:01,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 11:04:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-01-06 11:04:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 11:04:01,989 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:01,989 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:02,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 11:04:02,190 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash 33538966, now seen corresponding path program 21 times [2021-01-06 11:04:02,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:02,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939671329] [2021-01-06 11:04:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 129 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:02,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939671329] [2021-01-06 11:04:02,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401611153] [2021-01-06 11:04:02,584 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 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 11:04:03,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 11:04:03,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 11:04:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 162 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:03,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:03,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-01-06 11:04:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581682084] [2021-01-06 11:04:03,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 11:04:03,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 11:04:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 11:04:03,583 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 34 states. [2021-01-06 11:04:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:03,936 INFO L93 Difference]: Finished difference Result 124 states and 127 transitions. [2021-01-06 11:04:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:04:03,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2021-01-06 11:04:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:03,937 INFO L225 Difference]: With dead ends: 124 [2021-01-06 11:04:03,938 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 11:04:03,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 11:04:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 11:04:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 11:04:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 11:04:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 11:04:03,956 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2021-01-06 11:04:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:03,956 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 11:04:03,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 11:04:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 11:04:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 11:04:03,957 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:03,957 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:04,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 11:04:04,172 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1499458916, now seen corresponding path program 22 times [2021-01-06 11:04:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:04,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526074358] [2021-01-06 11:04:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:05,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526074358] [2021-01-06 11:04:05,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253183913] [2021-01-06 11:04:05,703 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 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 11:04:05,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:04:05,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:05,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 11:04:05,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:07,687 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:04:07,688 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:07,695 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:07,696 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:07,697 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:04:09,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:09,138 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:09,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:09,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:09,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-01-06 11:04:09,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808392269] [2021-01-06 11:04:09,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 11:04:09,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 11:04:09,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4470, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 11:04:09,259 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 69 states. [2021-01-06 11:04:12,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:12,831 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-01-06 11:04:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 11:04:12,833 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 77 [2021-01-06 11:04:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:12,833 INFO L225 Difference]: With dead ends: 131 [2021-01-06 11:04:12,834 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 11:04:12,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=346, Invalid=6626, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 11:04:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 11:04:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 86. [2021-01-06 11:04:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 11:04:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-01-06 11:04:12,857 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2021-01-06 11:04:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:12,857 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-01-06 11:04:12,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 11:04:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-01-06 11:04:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 11:04:12,858 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:12,858 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:13,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 11:04:13,074 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1604461515, now seen corresponding path program 9 times [2021-01-06 11:04:13,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:13,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123267455] [2021-01-06 11:04:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 11:04:13,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123267455] [2021-01-06 11:04:13,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407811947] [2021-01-06 11:04:13,361 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 11:04:13,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 11:04:13,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:04:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 11:04:14,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:14,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-01-06 11:04:14,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638183175] [2021-01-06 11:04:14,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 11:04:14,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:14,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 11:04:14,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:04:14,077 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 29 states. [2021-01-06 11:04:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:14,343 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2021-01-06 11:04:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:04:14,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2021-01-06 11:04:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:14,346 INFO L225 Difference]: With dead ends: 212 [2021-01-06 11:04:14,346 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 11:04:14,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:04:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 11:04:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 88. [2021-01-06 11:04:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 11:04:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-01-06 11:04:14,368 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2021-01-06 11:04:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:14,369 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-01-06 11:04:14,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 11:04:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-01-06 11:04:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 11:04:14,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:14,370 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:14,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 11:04:14,582 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1642864086, now seen corresponding path program 23 times [2021-01-06 11:04:14,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:14,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930551379] [2021-01-06 11:04:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930551379] [2021-01-06 11:04:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844771584] [2021-01-06 11:04:16,249 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 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 11:04:16,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 11:04:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:16,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 11:04:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:18,539 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:04:18,540 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:18,551 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:18,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:18,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-01-06 11:04:18,805 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:18,806 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:04:18,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:18,810 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:18,842 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:04:18,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:18,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:04:20,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:20,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:20,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:20,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:20,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2021-01-06 11:04:20,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650752165] [2021-01-06 11:04:20,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 11:04:20,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:20,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 11:04:20,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4883, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 11:04:20,552 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 72 states. [2021-01-06 11:04:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:24,835 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2021-01-06 11:04:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 11:04:24,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 80 [2021-01-06 11:04:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:24,837 INFO L225 Difference]: With dead ends: 137 [2021-01-06 11:04:24,837 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 11:04:24,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=525, Invalid=9177, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 11:04:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 11:04:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2021-01-06 11:04:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 11:04:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-01-06 11:04:24,855 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2021-01-06 11:04:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:24,856 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-01-06 11:04:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 11:04:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-01-06 11:04:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 11:04:24,856 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:24,857 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:25,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 11:04:25,059 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1707026770, now seen corresponding path program 24 times [2021-01-06 11:04:25,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:25,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755444743] [2021-01-06 11:04:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 163 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:25,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755444743] [2021-01-06 11:04:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618359301] [2021-01-06 11:04:25,467 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 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 11:04:25,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 11:04:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:04:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 200 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:26,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:26,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-01-06 11:04:26,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393859459] [2021-01-06 11:04:26,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 11:04:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 11:04:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:04:26,520 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 37 states. [2021-01-06 11:04:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:26,764 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2021-01-06 11:04:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 11:04:26,770 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2021-01-06 11:04:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:26,771 INFO L225 Difference]: With dead ends: 135 [2021-01-06 11:04:26,771 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 11:04:26,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:04:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 11:04:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 11:04:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 11:04:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-01-06 11:04:26,796 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2021-01-06 11:04:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:26,796 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-01-06 11:04:26,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 11:04:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-01-06 11:04:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 11:04:26,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:26,797 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:26,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:26,998 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash 960432012, now seen corresponding path program 25 times [2021-01-06 11:04:26,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:26,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454340723] [2021-01-06 11:04:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:28,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454340723] [2021-01-06 11:04:28,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660774432] [2021-01-06 11:04:28,569 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 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 11:04:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 11:04:28,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:30,790 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:04:30,791 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:30,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:30,802 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:30,802 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:04:32,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:32,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:32,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:32,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:32,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 75 [2021-01-06 11:04:32,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579311367] [2021-01-06 11:04:32,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 11:04:32,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 11:04:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=5308, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 11:04:32,565 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 75 states. [2021-01-06 11:04:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:35,970 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2021-01-06 11:04:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 11:04:35,971 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 84 [2021-01-06 11:04:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:35,972 INFO L225 Difference]: With dead ends: 142 [2021-01-06 11:04:35,972 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 11:04:35,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=374, Invalid=7816, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 11:04:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 11:04:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 93. [2021-01-06 11:04:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 11:04:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-01-06 11:04:35,993 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 84 [2021-01-06 11:04:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:35,993 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-01-06 11:04:35,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 11:04:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-01-06 11:04:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 11:04:35,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:35,994 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:36,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:36,195 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:36,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1155380773, now seen corresponding path program 10 times [2021-01-06 11:04:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:36,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474263889] [2021-01-06 11:04:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 11:04:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474263889] [2021-01-06 11:04:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229321365] [2021-01-06 11:04:36,448 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 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 11:04:36,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:04:36,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 11:04:36,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:37,574 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:04:37,575 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:37,588 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:37,589 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:37,590 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 11:04:37,751 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:37,752 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:04:37,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:37,756 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:37,789 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:04:37,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:37,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:04:38,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:39,000 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:39,003 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:39,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:39,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 40] total 55 [2021-01-06 11:04:39,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66755627] [2021-01-06 11:04:39,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 11:04:39,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 11:04:39,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2748, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:04:39,107 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 55 states. [2021-01-06 11:04:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:45,843 INFO L93 Difference]: Finished difference Result 245 states and 252 transitions. [2021-01-06 11:04:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 11:04:45,846 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2021-01-06 11:04:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:45,847 INFO L225 Difference]: With dead ends: 245 [2021-01-06 11:04:45,847 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 11:04:45,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3392 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=860, Invalid=12022, Unknown=0, NotChecked=0, Total=12882 [2021-01-06 11:04:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 11:04:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 94. [2021-01-06 11:04:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 11:04:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-01-06 11:04:45,871 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2021-01-06 11:04:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:45,871 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-01-06 11:04:45,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 11:04:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-01-06 11:04:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 11:04:45,872 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:45,872 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:46,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:46,078 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash -184932798, now seen corresponding path program 26 times [2021-01-06 11:04:46,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:46,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229504334] [2021-01-06 11:04:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 201 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:46,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229504334] [2021-01-06 11:04:46,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829280525] [2021-01-06 11:04:46,711 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 11:04:46,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:04:46,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 11:04:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 242 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:47,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:47,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-01-06 11:04:47,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568814396] [2021-01-06 11:04:47,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 11:04:47,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:47,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 11:04:47,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:04:47,631 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 40 states. [2021-01-06 11:04:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:48,220 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2021-01-06 11:04:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:04:48,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2021-01-06 11:04:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:48,222 INFO L225 Difference]: With dead ends: 146 [2021-01-06 11:04:48,222 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 11:04:48,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:04:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 11:04:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-01-06 11:04:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 11:04:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-01-06 11:04:48,244 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2021-01-06 11:04:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:48,245 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-01-06 11:04:48,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 11:04:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-01-06 11:04:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 11:04:48,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:48,245 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:48,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 11:04:48,446 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -762793272, now seen corresponding path program 27 times [2021-01-06 11:04:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:48,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127853698] [2021-01-06 11:04:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127853698] [2021-01-06 11:04:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992304003] [2021-01-06 11:04:51,044 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 11:04:51,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 11:04:51,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 11:04:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:51,505 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-01-06 11:04:51,507 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:51,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:51,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:51,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:10 [2021-01-06 11:04:54,558 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:04:54,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:54,576 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:54,577 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:54,578 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-01-06 11:04:57,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:57,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:57,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:57,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:57,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 221 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:57,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:57,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-01-06 11:04:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690186872] [2021-01-06 11:04:57,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 11:04:57,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 11:04:57,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=6362, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 11:04:57,584 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 82 states. [2021-01-06 11:05:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:07,188 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2021-01-06 11:05:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 11:05:07,190 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 91 [2021-01-06 11:05:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:07,190 INFO L225 Difference]: With dead ends: 147 [2021-01-06 11:05:07,190 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 11:05:07,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=789, Invalid=16503, Unknown=0, NotChecked=0, Total=17292 [2021-01-06 11:05:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 11:05:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-01-06 11:05:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 11:05:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-01-06 11:05:07,217 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2021-01-06 11:05:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:07,217 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-01-06 11:05:07,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 11:05:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-01-06 11:05:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 11:05:07,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:07,218 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:07,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:07,432 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:07,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1377526625, now seen corresponding path program 11 times [2021-01-06 11:05:07,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:07,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716664501] [2021-01-06 11:05:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 11:05:07,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716664501] [2021-01-06 11:05:07,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884350448] [2021-01-06 11:05:07,773 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 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 11:05:08,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 11:05:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:05:08,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 11:05:08,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:08,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-01-06 11:05:08,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699342120] [2021-01-06 11:05:08,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 11:05:08,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 11:05:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:05:08,531 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2021-01-06 11:05:08,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:08,794 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2021-01-06 11:05:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:05:08,796 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2021-01-06 11:05:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:08,797 INFO L225 Difference]: With dead ends: 197 [2021-01-06 11:05:08,797 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 11:05:08,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:05:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 11:05:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2021-01-06 11:05:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 11:05:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-01-06 11:05:08,825 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2021-01-06 11:05:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:08,825 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-01-06 11:05:08,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 11:05:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-01-06 11:05:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 11:05:08,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:08,826 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:09,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:09,026 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:09,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1575251838, now seen corresponding path program 28 times [2021-01-06 11:05:09,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:09,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682077324] [2021-01-06 11:05:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:11,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682077324] [2021-01-06 11:05:11,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683553092] [2021-01-06 11:05:11,587 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 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 11:05:11,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:11,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:11,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 11:05:11,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:14,445 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:05:14,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:14,459 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:14,460 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:14,461 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 11:05:14,764 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:14,764 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:05:14,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:14,768 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:14,802 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:05:14,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:14,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:05:17,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:17,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:17,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:17,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:17,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2021-01-06 11:05:17,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621955850] [2021-01-06 11:05:17,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-01-06 11:05:17,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:17,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-01-06 11:05:17,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=6757, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 11:05:17,362 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 84 states. [2021-01-06 11:05:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:28,228 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-01-06 11:05:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 11:05:28,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 94 [2021-01-06 11:05:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:28,231 INFO L225 Difference]: With dead ends: 106 [2021-01-06 11:05:28,231 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 11:05:28,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4860 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=691, Invalid=18215, Unknown=0, NotChecked=0, Total=18906 [2021-01-06 11:05:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 11:05:28,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2021-01-06 11:05:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 11:05:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-01-06 11:05:28,261 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 94 [2021-01-06 11:05:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:28,262 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-01-06 11:05:28,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2021-01-06 11:05:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-01-06 11:05:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 11:05:28,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:28,263 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:28,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 11:05:28,477 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:28,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:28,478 INFO L82 PathProgramCache]: Analyzing trace with hash 433931320, now seen corresponding path program 29 times [2021-01-06 11:05:28,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:28,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859135627] [2021-01-06 11:05:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:30,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859135627] [2021-01-06 11:05:30,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410090885] [2021-01-06 11:05:30,900 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 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 11:05:31,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 11:05:31,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 11:05:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:34,504 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 11:05:34,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:34,517 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:34,518 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:34,529 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-01-06 11:05:36,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:36,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:36,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:36,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:37,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:37,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43] total 86 [2021-01-06 11:05:37,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568069633] [2021-01-06 11:05:37,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 11:05:37,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:37,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 11:05:37,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=7034, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 11:05:37,104 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 86 states. [2021-01-06 11:05:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:42,578 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2021-01-06 11:05:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 11:05:42,579 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 98 [2021-01-06 11:05:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:42,581 INFO L225 Difference]: With dead ends: 164 [2021-01-06 11:05:42,581 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 11:05:42,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=410, Invalid=10096, Unknown=0, NotChecked=0, Total=10506 [2021-01-06 11:05:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 11:05:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-01-06 11:05:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 11:05:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-01-06 11:05:42,616 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 98 [2021-01-06 11:05:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:42,616 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-01-06 11:05:42,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 11:05:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-01-06 11:05:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 11:05:42,617 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:42,617 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:42,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 11:05:42,830 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash -664094255, now seen corresponding path program 12 times [2021-01-06 11:05:42,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:42,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189097765] [2021-01-06 11:05:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 11:05:43,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189097765] [2021-01-06 11:05:43,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81948855] [2021-01-06 11:05:43,229 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 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 11:05:43,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 11:05:43,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:05:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 11:05:44,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:44,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-01-06 11:05:44,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989519505] [2021-01-06 11:05:44,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 11:05:44,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:44,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 11:05:44,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 11:05:44,623 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 35 states. [2021-01-06 11:05:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:44,956 INFO L93 Difference]: Finished difference Result 269 states and 274 transitions. [2021-01-06 11:05:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:05:44,958 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2021-01-06 11:05:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:44,959 INFO L225 Difference]: With dead ends: 269 [2021-01-06 11:05:44,959 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 11:05:44,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 11:05:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 11:05:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-01-06 11:05:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 11:05:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2021-01-06 11:05:44,994 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 100 [2021-01-06 11:05:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:44,994 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2021-01-06 11:05:44,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 11:05:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2021-01-06 11:05:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 11:05:44,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:44,995 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:45,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 11:05:45,210 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash -547200706, now seen corresponding path program 30 times [2021-01-06 11:05:45,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:45,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122496598] [2021-01-06 11:05:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:47,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122496598] [2021-01-06 11:05:47,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569709844] [2021-01-06 11:05:47,854 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 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 11:05:48,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 11:05:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 99 conjunts are in the unsatisfiable core [2021-01-06 11:05:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:53,091 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:05:53,093 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:53,111 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:53,113 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:53,113 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-01-06 11:05:53,540 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:53,541 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 11:05:53,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:53,546 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:53,596 INFO L625 ElimStorePlain]: treesize reduction 22, result has 57.7 percent of original size [2021-01-06 11:05:53,598 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:53,599 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:15 [2021-01-06 11:05:56,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:56,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:56,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:05:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:57,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:57,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2021-01-06 11:05:57,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009784295] [2021-01-06 11:05:57,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 11:05:57,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 11:05:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=7721, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 11:05:57,075 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 90 states. [2021-01-06 11:06:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:06,466 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2021-01-06 11:06:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 11:06:06,467 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 101 [2021-01-06 11:06:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:06,468 INFO L225 Difference]: With dead ends: 170 [2021-01-06 11:06:06,468 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 11:06:06,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=651, Invalid=14355, Unknown=0, NotChecked=0, Total=15006 [2021-01-06 11:06:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 11:06:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 108. [2021-01-06 11:06:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 11:06:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2021-01-06 11:06:06,504 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2021-01-06 11:06:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:06,504 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2021-01-06 11:06:06,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 11:06:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2021-01-06 11:06:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 11:06:06,505 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:06,505 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:06,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:06,705 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1382929170, now seen corresponding path program 31 times [2021-01-06 11:06:06,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:06,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93045000] [2021-01-06 11:06:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 289 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:07,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93045000] [2021-01-06 11:06:07,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285024201] [2021-01-06 11:06:07,729 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 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 11:06:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:07,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 11:06:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 338 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:09,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:09,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-01-06 11:06:09,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629692434] [2021-01-06 11:06:09,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 11:06:09,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:09,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 11:06:09,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 11:06:09,229 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 46 states. [2021-01-06 11:06:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:10,124 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2021-01-06 11:06:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 11:06:10,126 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2021-01-06 11:06:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:10,127 INFO L225 Difference]: With dead ends: 168 [2021-01-06 11:06:10,127 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 11:06:10,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 11:06:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 11:06:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-01-06 11:06:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 11:06:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-01-06 11:06:10,154 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 102 [2021-01-06 11:06:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:10,154 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-01-06 11:06:10,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 11:06:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-01-06 11:06:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 11:06:10,154 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:10,155 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:10,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:10,355 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1047177484, now seen corresponding path program 32 times [2021-01-06 11:06:10,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:10,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703920824] [2021-01-06 11:06:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:13,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703920824] [2021-01-06 11:06:13,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306076878] [2021-01-06 11:06:13,775 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 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 11:06:13,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:06:13,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:13,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 11:06:13,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:18,744 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 11:06:18,746 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:18,763 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:18,765 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:06:18,765 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-01-06 11:06:22,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:06:22,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:06:22,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:06:22,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:06:22,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:06:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 313 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:23,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:23,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2021-01-06 11:06:23,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300133535] [2021-01-06 11:06:23,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 11:06:23,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 11:06:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=8359, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 11:06:23,156 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 94 states. [2021-01-06 11:06:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:35,184 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2021-01-06 11:06:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 11:06:35,186 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 105 [2021-01-06 11:06:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:35,187 INFO L225 Difference]: With dead ends: 169 [2021-01-06 11:06:35,187 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 11:06:35,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4021 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=820, Invalid=14432, Unknown=0, NotChecked=0, Total=15252 [2021-01-06 11:06:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 11:06:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-01-06 11:06:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 11:06:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-01-06 11:06:35,216 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 105 [2021-01-06 11:06:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:35,216 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-01-06 11:06:35,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 11:06:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-01-06 11:06:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 11:06:35,217 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:35,217 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:35,420 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash -156635507, now seen corresponding path program 13 times [2021-01-06 11:06:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:35,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922966591] [2021-01-06 11:06:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 11:06:36,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922966591] [2021-01-06 11:06:36,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279627536] [2021-01-06 11:06:36,006 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 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 11:06:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:36,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:06:36,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 11:06:37,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:37,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-01-06 11:06:37,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389983817] [2021-01-06 11:06:37,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 11:06:37,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 11:06:37,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:06:37,101 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2021-01-06 11:06:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:37,451 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2021-01-06 11:06:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:06:37,454 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2021-01-06 11:06:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:37,455 INFO L225 Difference]: With dead ends: 227 [2021-01-06 11:06:37,455 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 11:06:37,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:06:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 11:06:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2021-01-06 11:06:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 11:06:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-01-06 11:06:37,486 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2021-01-06 11:06:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:37,487 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-01-06 11:06:37,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 11:06:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-01-06 11:06:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 11:06:37,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:37,488 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:37,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:37,702 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1647532242, now seen corresponding path program 33 times [2021-01-06 11:06:37,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:37,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694247004] [2021-01-06 11:06:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:41,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694247004] [2021-01-06 11:06:41,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108602205] [2021-01-06 11:06:41,646 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 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