/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_min_and_copy_shift_sum_add.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:03:50,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:03:50,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:03:50,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:03:50,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:03:50,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:03:50,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:03:50,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:03:50,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:03:50,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:03:50,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:03:50,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:03:50,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:03:50,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:03:50,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:03:50,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:03:50,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:03:50,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:03:50,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:03:50,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:03:50,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:03:50,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:03:50,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:03:50,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:03:50,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:03:50,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:03:50,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:03:50,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:03:50,834 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 11:03:50,885 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:03:50,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:03:50,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:03:50,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:03:50,893 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:03:50,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:03:50,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:03:50,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:03:50,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:03:50,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:03:50,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:03:50,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:03:50,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:03:50,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:03:50,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:03:50,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:03:50,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:03:50,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:03:50,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:03:50,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:03:50,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:03:50,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:03:50,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:03:50,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:03:50,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:03:50,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:03:51,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:03:51,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:03:51,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:03:51,415 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:03:51,416 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:03:51,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-01-06 11:03:51,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b4201fec2/90b47a9ae5874da7a4a1774e3c7e936f/FLAG7d2aebf8a [2021-01-06 11:03:52,117 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:03:52,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-01-06 11:03:52,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b4201fec2/90b47a9ae5874da7a4a1774e3c7e936f/FLAG7d2aebf8a [2021-01-06 11:03:52,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b4201fec2/90b47a9ae5874da7a4a1774e3c7e936f [2021-01-06 11:03:52,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:03:52,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:03:52,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:03:52,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:03:52,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:03:52,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0ec57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52, skipping insertion in model container [2021-01-06 11:03:52,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:03:52,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:03:52,675 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_min_and_copy_shift_sum_add.c[423,436] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 11:03:52,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:03:52,712 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:03:52,726 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_min_and_copy_shift_sum_add.c[423,436] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 11:03:52,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:03:52,756 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:03:52,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52 WrapperNode [2021-01-06 11:03:52,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:03:52,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:03:52,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:03:52,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:03:52,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:03:52,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:03:52,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:03:52,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:03:52,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (1/1) ... [2021-01-06 11:03:52,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:03:52,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:03:52,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:03:52,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:03:52,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (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 11:03:52,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:03:52,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:03:52,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:03:52,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:03:52,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:03:52,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:03:52,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:03:53,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:03:53,440 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 11:03:53,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:03:53 BoogieIcfgContainer [2021-01-06 11:03:53,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:03:53,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:03:53,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:03:53,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:03:53,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:03:52" (1/3) ... [2021-01-06 11:03:53,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6872beb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:03:53, skipping insertion in model container [2021-01-06 11:03:53,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:03:52" (2/3) ... [2021-01-06 11:03:53,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6872beb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:03:53, skipping insertion in model container [2021-01-06 11:03:53,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:03:53" (3/3) ... [2021-01-06 11:03:53,457 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2021-01-06 11:03:53,468 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:03:53,474 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:03:53,534 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:03:53,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:03:53,583 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:03:53,583 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:03:53,583 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:03:53,583 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:03:53,583 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:03:53,584 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:03:53,584 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:03:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 11:03:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:03:53,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:53,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:53,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1074116968, now seen corresponding path program 1 times [2021-01-06 11:03:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:53,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393170881] [2021-01-06 11:03:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:53,880 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 11:03:53,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393170881] [2021-01-06 11:03:53,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:03:53,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:03:53,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258265204] [2021-01-06 11:03:53,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:03:53,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:03:53,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:03:53,916 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2021-01-06 11:03:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:53,942 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-01-06 11:03:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:03:53,944 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2021-01-06 11:03:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:53,970 INFO L225 Difference]: With dead ends: 51 [2021-01-06 11:03:53,971 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 11:03:53,975 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 11:03:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 11:03:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 11:03:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:03:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 11:03:54,029 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-01-06 11:03:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:54,030 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 11:03:54,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:03:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 11:03:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:03:54,032 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:54,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:54,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:03:54,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1208978540, now seen corresponding path program 1 times [2021-01-06 11:03:54,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:54,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279862656] [2021-01-06 11:03:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:54,248 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 11:03:54,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279862656] [2021-01-06 11:03:54,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:03:54,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:03:54,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414019995] [2021-01-06 11:03:54,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:03:54,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:54,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:03:54,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:03:54,253 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2021-01-06 11:03:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:54,294 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-01-06 11:03:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:03:54,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-06 11:03:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:54,296 INFO L225 Difference]: With dead ends: 28 [2021-01-06 11:03:54,296 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 11:03:54,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:03:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 11:03:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 11:03:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:03:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 11:03:54,303 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2021-01-06 11:03:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:54,304 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 11:03:54,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:03:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 11:03:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:03:54,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:54,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:54,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:03:54,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2133972746, now seen corresponding path program 1 times [2021-01-06 11:03:54,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:54,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813512096] [2021-01-06 11:03:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:54,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813512096] [2021-01-06 11:03:54,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:03:54,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 11:03:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222042424] [2021-01-06 11:03:54,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:03:54,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:54,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:03:54,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:03:54,459 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2021-01-06 11:03:54,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:54,616 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-01-06 11:03:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:03:54,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 11:03:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:54,620 INFO L225 Difference]: With dead ends: 48 [2021-01-06 11:03:54,621 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:03:54,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:03:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:03:54,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-01-06 11:03:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 11:03:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-01-06 11:03:54,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2021-01-06 11:03:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:54,644 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-01-06 11:03:54,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:03:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-01-06 11:03:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:03:54,648 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:54,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:54,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:03:54,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1668746636, now seen corresponding path program 1 times [2021-01-06 11:03:54,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:54,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700658278] [2021-01-06 11:03:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:55,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700658278] [2021-01-06 11:03:55,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364704378] [2021-01-06 11:03:55,114 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 11:03:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 11:03:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:55,394 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:55,395 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 27 treesize of output 42 [2021-01-06 11:03:55,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:55,427 INFO L625 ElimStorePlain]: treesize reduction 16, result has 66.0 percent of original size [2021-01-06 11:03:55,430 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 11:03:55,431 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:14 [2021-01-06 11:03:55,495 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-01-06 11:03:55,497 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:55,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:55,500 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 11:03:55,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2021-01-06 11:03:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:55,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:55,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-01-06 11:03:55,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964388373] [2021-01-06 11:03:55,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:03:55,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:03:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:03:55,524 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 18 states. [2021-01-06 11:03:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:55,931 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-01-06 11:03:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:03:55,932 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2021-01-06 11:03:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:55,933 INFO L225 Difference]: With dead ends: 53 [2021-01-06 11:03:55,934 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 11:03:55,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:03:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 11:03:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-01-06 11:03:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:03:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-01-06 11:03:55,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2021-01-06 11:03:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:55,943 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-01-06 11:03:55,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:03:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-01-06 11:03:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:03:55,945 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:55,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:56,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:56,161 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 657629386, now seen corresponding path program 1 times [2021-01-06 11:03:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:56,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303751229] [2021-01-06 11:03:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:56,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303751229] [2021-01-06 11:03:56,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962021507] [2021-01-06 11:03:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 11:03:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:56,993 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:56,994 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 27 treesize of output 42 [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 11:03:57,037 INFO L625 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2021-01-06 11:03:57,049 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 11:03:57,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:14 [2021-01-06 11:03:57,127 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-01-06 11:03:57,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:03:57,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:03:57,132 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 11:03:57,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2021-01-06 11:03:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:03:57,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:57,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-01-06 11:03:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882215974] [2021-01-06 11:03:57,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:03:57,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:03:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:03:57,164 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 22 states. [2021-01-06 11:03:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:58,050 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-01-06 11:03:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:03:58,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 11:03:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:58,054 INFO L225 Difference]: With dead ends: 78 [2021-01-06 11:03:58,054 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 11:03:58,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:03:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 11:03:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2021-01-06 11:03:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:03:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-01-06 11:03:58,084 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2021-01-06 11:03:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:58,085 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-01-06 11:03:58,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:03:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-01-06 11:03:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 11:03:58,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:58,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:58,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:58,288 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1695950062, now seen corresponding path program 2 times [2021-01-06 11:03:58,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:58,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208969574] [2021-01-06 11:03:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:03:58,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208969574] [2021-01-06 11:03:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15061519] [2021-01-06 11:03:58,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:58,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:03:58,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:03:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:03:58,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:58,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:03:58,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414442468] [2021-01-06 11:03:58,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:03:58,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:03:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:03:58,539 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 10 states. [2021-01-06 11:03:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:58,689 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-01-06 11:03:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:03:58,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-01-06 11:03:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:58,690 INFO L225 Difference]: With dead ends: 88 [2021-01-06 11:03:58,690 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 11:03:58,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:03:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 11:03:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2021-01-06 11:03:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 11:03:58,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-01-06 11:03:58,699 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 27 [2021-01-06 11:03:58,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:58,699 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-01-06 11:03:58,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:03:58,700 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-01-06 11:03:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:03:58,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:58,715 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:58,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:58,917 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:58,918 INFO L82 PathProgramCache]: Analyzing trace with hash 573504280, now seen corresponding path program 3 times [2021-01-06 11:03:58,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:58,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838112263] [2021-01-06 11:03:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:03:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:03:59,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838112263] [2021-01-06 11:03:59,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404179831] [2021-01-06 11:03:59,037 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 11:03:59,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 11:03:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:03:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:03:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:03:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:03:59,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:03:59,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 11:03:59,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119870276] [2021-01-06 11:03:59,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:03:59,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:03:59,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:03:59,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:03:59,186 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 10 states. [2021-01-06 11:03:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:03:59,323 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-01-06 11:03:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:03:59,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2021-01-06 11:03:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:03:59,325 INFO L225 Difference]: With dead ends: 58 [2021-01-06 11:03:59,325 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 11:03:59,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:03:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 11:03:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-01-06 11:03:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 11:03:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 11:03:59,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2021-01-06 11:03:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:03:59,333 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 11:03:59,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:03:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 11:03:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:03:59,334 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:03:59,334 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:03:59,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:03:59,549 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:03:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:03:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -964146404, now seen corresponding path program 4 times [2021-01-06 11:03:59,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:03:59,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674747868] [2021-01-06 11:03:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:03:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:00,569 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 11:04:00,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674747868] [2021-01-06 11:04:00,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558147031] [2021-01-06 11:04:00,570 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 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 11:04:00,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:04:00,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:00,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 11:04:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:00,671 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 10 treesize of output 8 [2021-01-06 11:04:00,673 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:00,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:00,682 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:00,683 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 11:04:01,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:01,082 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-01-06 11:04:01,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:01,107 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:01,108 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:01,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:64 [2021-01-06 11:04:01,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:01,266 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 44 [2021-01-06 11:04:01,269 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:01,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:01,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:01,288 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:56 [2021-01-06 11:04:01,655 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2021-01-06 11:04:01,658 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:01,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:01,664 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 11:04:01,664 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:3 [2021-01-06 11:04:01,723 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 11:04:01,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:01,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-01-06 11:04:01,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530154431] [2021-01-06 11:04:01,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 11:04:01,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:01,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 11:04:01,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:04:01,726 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 36 states. [2021-01-06 11:04:03,253 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-01-06 11:04:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:04,457 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-01-06 11:04:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 11:04:04,457 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2021-01-06 11:04:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:04,459 INFO L225 Difference]: With dead ends: 84 [2021-01-06 11:04:04,459 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 11:04:04,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=420, Invalid=2772, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 11:04:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 11:04:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2021-01-06 11:04:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 11:04:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-01-06 11:04:04,472 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 36 [2021-01-06 11:04:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:04,472 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-01-06 11:04:04,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 11:04:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-01-06 11:04:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:04:04,474 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:04,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:04,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:04,690 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:04,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1336676186, now seen corresponding path program 1 times [2021-01-06 11:04:04,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:04,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599300130] [2021-01-06 11:04:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:05,887 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 11:04:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599300130] [2021-01-06 11:04:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248171710] [2021-01-06 11:04:05,888 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 11:04:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 11:04:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:06,049 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 10 treesize of output 8 [2021-01-06 11:04:06,052 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:06,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:06,062 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:06,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 11:04:06,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:06,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:06,413 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-01-06 11:04:06,417 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:06,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:06,439 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:06,440 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:58 [2021-01-06 11:04:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:06,607 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 44 [2021-01-06 11:04:06,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:06,623 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:06,625 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:06,625 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:52 [2021-01-06 11:04:07,003 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2021-01-06 11:04:07,006 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:07,011 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:07,013 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 11:04:07,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:3 [2021-01-06 11:04:07,077 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 11:04:07,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:07,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-01-06 11:04:07,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164089865] [2021-01-06 11:04:07,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 11:04:07,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 11:04:07,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:04:07,082 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 36 states. [2021-01-06 11:04:08,320 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 11:04:08,686 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-01-06 11:04:08,875 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-01-06 11:04:09,958 WARN L197 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-01-06 11:04:10,196 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-01-06 11:04:10,449 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 11:04:11,911 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-01-06 11:04:13,141 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2021-01-06 11:04:13,314 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-01-06 11:04:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:13,812 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-01-06 11:04:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:04:13,813 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2021-01-06 11:04:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:13,814 INFO L225 Difference]: With dead ends: 96 [2021-01-06 11:04:13,815 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 11:04:13,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=484, Invalid=3056, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 11:04:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 11:04:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2021-01-06 11:04:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 11:04:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-01-06 11:04:13,829 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 36 [2021-01-06 11:04:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:13,829 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-01-06 11:04:13,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 11:04:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-01-06 11:04:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:04:13,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:13,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:14,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:14,045 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash -823597794, now seen corresponding path program 2 times [2021-01-06 11:04:14,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:14,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085692763] [2021-01-06 11:04:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:15,036 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 11:04:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085692763] [2021-01-06 11:04:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95610216] [2021-01-06 11:04:15,037 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 11:04:15,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:04:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 11:04:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:15,158 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:15,159 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-01-06 11:04:15,166 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:15,176 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:15,177 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:15,177 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-01-06 11:04:15,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:15,639 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-01-06 11:04:15,640 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:15,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:15,666 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:15,666 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:66 [2021-01-06 11:04:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:15,832 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 44 [2021-01-06 11:04:15,834 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:15,850 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:15,852 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:15,852 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:64 [2021-01-06 11:04:16,239 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 22 [2021-01-06 11:04:16,242 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:16,247 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:16,250 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 11:04:16,250 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:9 [2021-01-06 11:04:16,339 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 11:04:16,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:16,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2021-01-06 11:04:16,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512092709] [2021-01-06 11:04:16,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 11:04:16,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 11:04:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 11:04:16,342 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 38 states. [2021-01-06 11:04:18,030 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-01-06 11:04:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:20,772 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2021-01-06 11:04:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 11:04:20,772 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 36 [2021-01-06 11:04:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:20,774 INFO L225 Difference]: With dead ends: 138 [2021-01-06 11:04:20,774 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 11:04:20,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 11:04:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 11:04:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 78. [2021-01-06 11:04:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 11:04:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2021-01-06 11:04:20,789 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 36 [2021-01-06 11:04:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:20,789 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2021-01-06 11:04:20,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 11:04:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2021-01-06 11:04:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:04:20,791 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:20,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:21,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:04:21,006 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1477224796, now seen corresponding path program 2 times [2021-01-06 11:04:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:21,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835154941] [2021-01-06 11:04:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:22,377 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 11:04:22,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835154941] [2021-01-06 11:04:22,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041387929] [2021-01-06 11:04:22,378 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 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 11:04:22,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:04:22,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 11:04:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:22,478 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:22,479 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-01-06 11:04:22,481 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:22,490 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:22,491 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:22,491 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-01-06 11:04:23,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:23,018 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-01-06 11:04:23,023 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:23,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:23,045 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:23,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:58 [2021-01-06 11:04:23,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:23,250 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 44 [2021-01-06 11:04:23,252 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:23,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:23,279 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:23,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:52 [2021-01-06 11:04:23,721 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2021-01-06 11:04:23,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:23,728 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:23,729 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 11:04:23,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:3 [2021-01-06 11:04:23,789 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 11:04:23,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:23,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2021-01-06 11:04:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342582557] [2021-01-06 11:04:23,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 11:04:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 11:04:23,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 11:04:23,792 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 39 states. [2021-01-06 11:04:27,470 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2021-01-06 11:04:29,208 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-01-06 11:04:30,467 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-01-06 11:04:30,650 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-01-06 11:04:30,941 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 11:04:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:31,573 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-01-06 11:04:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 11:04:31,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 36 [2021-01-06 11:04:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:31,575 INFO L225 Difference]: With dead ends: 131 [2021-01-06 11:04:31,575 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 11:04:31,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=548, Invalid=4422, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 11:04:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 11:04:31,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 60. [2021-01-06 11:04:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 11:04:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-01-06 11:04:31,589 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 36 [2021-01-06 11:04:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:31,589 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-01-06 11:04:31,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 11:04:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-01-06 11:04:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:04:31,591 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:31,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:31,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 11:04:31,805 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1221475966, now seen corresponding path program 5 times [2021-01-06 11:04:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:31,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499661240] [2021-01-06 11:04:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:04:31,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499661240] [2021-01-06 11:04:31,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437927220] [2021-01-06 11:04:31,895 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 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 11:04:31,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 11:04:31,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:31,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:04:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:04:32,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:32,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 11:04:32,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395728823] [2021-01-06 11:04:32,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:04:32,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:04:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:04:32,088 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 13 states. [2021-01-06 11:04:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:32,285 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2021-01-06 11:04:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:04:32,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2021-01-06 11:04:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:32,286 INFO L225 Difference]: With dead ends: 122 [2021-01-06 11:04:32,286 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 11:04:32,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:04:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 11:04:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2021-01-06 11:04:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 11:04:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2021-01-06 11:04:32,300 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 38 [2021-01-06 11:04:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:32,300 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2021-01-06 11:04:32,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:04:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2021-01-06 11:04:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 11:04:32,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:32,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:32,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:32,518 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash 716221968, now seen corresponding path program 6 times [2021-01-06 11:04:32,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:32,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307869135] [2021-01-06 11:04:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:04:32,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307869135] [2021-01-06 11:04:32,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852951324] [2021-01-06 11:04:32,608 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 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 11:04:32,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 11:04:32,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:04:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:04:32,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:32,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 11:04:32,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565297845] [2021-01-06 11:04:32,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:04:32,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:04:32,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:04:32,796 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 13 states. [2021-01-06 11:04:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:33,043 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-01-06 11:04:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:04:33,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2021-01-06 11:04:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:33,045 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:04:33,045 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 11:04:33,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:04:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 11:04:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-01-06 11:04:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 11:04:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-01-06 11:04:33,055 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 43 [2021-01-06 11:04:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:33,055 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-01-06 11:04:33,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:04:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-01-06 11:04:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:04:33,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:33,056 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:33,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:04:33,270 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1851731436, now seen corresponding path program 7 times [2021-01-06 11:04:33,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:33,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779099232] [2021-01-06 11:04:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:34,525 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-01-06 11:04:34,857 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-01-06 11:04:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:35,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779099232] [2021-01-06 11:04:35,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201614147] [2021-01-06 11:04:35,462 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 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 11:04:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 11:04:35,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:35,626 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 10 treesize of output 8 [2021-01-06 11:04:35,628 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:35,639 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:35,640 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:35,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 11:04:36,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,365 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-01-06 11:04:36,367 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:36,395 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:36,397 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:36,397 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:79 [2021-01-06 11:04:36,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:36,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,636 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2021-01-06 11:04:36,640 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:36,672 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:36,673 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:36,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:92 [2021-01-06 11:04:36,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:36,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 70 [2021-01-06 11:04:36,955 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:36,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:36,981 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:36,982 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:100 [2021-01-06 11:04:37,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 31 [2021-01-06 11:04:37,891 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:37,895 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:37,897 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 11:04:37,898 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:9 [2021-01-06 11:04:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:38,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:38,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-01-06 11:04:38,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199113267] [2021-01-06 11:04:38,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 11:04:38,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 11:04:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 11:04:38,026 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 50 states. [2021-01-06 11:04:39,299 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-01-06 11:04:39,516 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 11:04:39,902 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-01-06 11:04:40,385 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-01-06 11:04:40,884 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-01-06 11:04:41,088 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-01-06 11:04:41,357 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-01-06 11:04:41,708 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-01-06 11:04:42,141 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2021-01-06 11:04:42,563 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2021-01-06 11:04:44,425 WARN L197 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 135 DAG size of output: 72 [2021-01-06 11:04:44,773 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-01-06 11:04:45,060 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-01-06 11:04:45,432 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-01-06 11:04:46,724 WARN L197 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2021-01-06 11:04:47,001 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-01-06 11:04:47,269 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-01-06 11:04:47,553 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-01-06 11:04:47,769 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-01-06 11:04:48,078 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-01-06 11:04:48,269 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-01-06 11:04:48,531 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-01-06 11:04:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:04:48,542 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-01-06 11:04:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 11:04:48,543 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 47 [2021-01-06 11:04:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:04:48,545 INFO L225 Difference]: With dead ends: 99 [2021-01-06 11:04:48,545 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 11:04:48,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=700, Invalid=6106, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 11:04:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 11:04:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-01-06 11:04:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 11:04:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-01-06 11:04:48,560 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 47 [2021-01-06 11:04:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:04:48,561 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-01-06 11:04:48,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 11:04:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-01-06 11:04:48,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:04:48,562 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:04:48,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:04:48,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:04:48,776 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:04:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:04:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1632876718, now seen corresponding path program 3 times [2021-01-06 11:04:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:04:48,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493267678] [2021-01-06 11:04:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:04:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:04:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:50,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493267678] [2021-01-06 11:04:50,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382441892] [2021-01-06 11:04:50,815 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 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 11:04:50,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:04:50,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:04:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 11:04:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:04:51,047 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:51,048 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-01-06 11:04:51,050 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:51,064 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:51,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:04:51,065 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:25 [2021-01-06 11:04:52,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:52,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:52,406 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:52,407 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 92 [2021-01-06 11:04:52,410 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:52,508 INFO L625 ElimStorePlain]: treesize reduction 38, result has 71.9 percent of original size [2021-01-06 11:04:52,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:52,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:99, output treesize:97 [2021-01-06 11:04:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:52,897 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:52,898 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 136 [2021-01-06 11:04:52,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:53,020 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-01-06 11:04:53,021 INFO L625 ElimStorePlain]: treesize reduction 91, result has 53.8 percent of original size [2021-01-06 11:04:53,023 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:53,023 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:112, output treesize:106 [2021-01-06 11:04:53,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:53,488 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:53,488 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 145 [2021-01-06 11:04:53,496 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:04:53,629 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-01-06 11:04:53,630 INFO L625 ElimStorePlain]: treesize reduction 85, result has 66.8 percent of original size [2021-01-06 11:04:53,636 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:53,637 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:181, output treesize:171 [2021-01-06 11:04:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:04:55,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:55,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:04:55,123 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:04:55,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 64 [2021-01-06 11:04:55,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,132 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,138 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,160 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,161 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,164 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,169 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,183 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,185 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,186 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,213 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,221 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,237 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,246 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,255 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,283 INFO L547 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:55,463 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-01-06 11:04:55,465 INFO L625 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-01-06 11:04:55,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,476 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,482 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,493 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:04:55,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:145, output treesize:115 [2021-01-06 11:04:55,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,509 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,511 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,512 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,518 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,783 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 11:04:55,799 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2021-01-06 11:04:55,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:04:55,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:04:55,815 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2021-01-06 11:04:55,823 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 11:04:55,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:04:55,828 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2021-01-06 11:04:55,836 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2021-01-06 11:04:55,848 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2021-01-06 11:04:55,856 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2021-01-06 11:04:56,550 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2021-01-06 11:04:56,558 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:04:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:04:56,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:04:56,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2021-01-06 11:04:56,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887529075] [2021-01-06 11:04:56,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 11:04:56,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:04:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 11:04:56,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2755, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:04:56,762 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 55 states. [2021-01-06 11:04:58,623 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-01-06 11:04:58,853 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-01-06 11:04:59,908 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-01-06 11:05:00,325 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-01-06 11:05:00,577 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2021-01-06 11:05:01,043 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2021-01-06 11:05:01,269 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-01-06 11:05:01,688 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2021-01-06 11:05:02,003 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-01-06 11:05:02,245 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2021-01-06 11:05:02,500 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-01-06 11:05:05,332 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-01-06 11:05:05,664 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2021-01-06 11:05:07,705 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 56 [2021-01-06 11:05:08,057 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2021-01-06 11:05:08,355 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-01-06 11:05:08,882 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2021-01-06 11:05:09,193 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-01-06 11:05:09,583 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-01-06 11:05:12,091 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2021-01-06 11:05:12,363 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-01-06 11:05:12,590 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-01-06 11:05:13,394 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2021-01-06 11:05:13,644 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-01-06 11:05:13,890 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-01-06 11:05:14,106 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-01-06 11:05:15,113 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 70 [2021-01-06 11:05:17,465 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-01-06 11:05:18,148 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2021-01-06 11:05:20,439 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-01-06 11:05:20,762 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-01-06 11:05:21,155 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 73 [2021-01-06 11:05:21,449 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-01-06 11:05:22,018 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2021-01-06 11:05:22,357 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-01-06 11:05:22,640 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-01-06 11:05:22,940 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-01-06 11:05:25,048 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-01-06 11:05:25,264 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-01-06 11:05:25,643 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 67 [2021-01-06 11:05:25,864 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-01-06 11:05:26,126 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-01-06 11:05:26,367 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-01-06 11:05:26,640 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-01-06 11:05:27,038 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2021-01-06 11:05:27,229 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-01-06 11:05:27,560 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-01-06 11:05:27,935 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 68 [2021-01-06 11:05:28,258 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-01-06 11:05:28,619 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2021-01-06 11:05:28,878 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-01-06 11:05:29,162 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-01-06 11:05:29,559 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 71 [2021-01-06 11:05:29,920 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-01-06 11:05:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:30,326 INFO L93 Difference]: Finished difference Result 252 states and 306 transitions. [2021-01-06 11:05:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 11:05:30,326 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 47 [2021-01-06 11:05:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:30,327 INFO L225 Difference]: With dead ends: 252 [2021-01-06 11:05:30,328 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 11:05:30,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5909 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=1741, Invalid=18565, Unknown=0, NotChecked=0, Total=20306 [2021-01-06 11:05:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 11:05:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 109. [2021-01-06 11:05:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 11:05:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2021-01-06 11:05:30,354 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 47 [2021-01-06 11:05:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:30,354 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2021-01-06 11:05:30,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 11:05:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2021-01-06 11:05:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:05:30,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:30,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:30,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:05:30,571 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:30,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:30,572 INFO L82 PathProgramCache]: Analyzing trace with hash -465528042, now seen corresponding path program 4 times [2021-01-06 11:05:30,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:30,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76021248] [2021-01-06 11:05:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:31,440 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-01-06 11:05:31,756 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-01-06 11:05:31,920 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-01-06 11:05:32,091 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-01-06 11:05:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76021248] [2021-01-06 11:05:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640969596] [2021-01-06 11:05:32,974 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 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 11:05:33,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:33,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 11:05:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:33,125 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 10 treesize of output 8 [2021-01-06 11:05:33,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:33,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:33,144 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:33,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 11:05:34,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:05:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:34,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:34,259 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-01-06 11:05:34,262 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:34,299 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:34,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:34,302 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:79 [2021-01-06 11:05:34,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:34,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:34,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:05:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:34,614 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2021-01-06 11:05:34,616 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:34,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:34,667 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:34,668 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:90 [2021-01-06 11:05:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:35,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 70 [2021-01-06 11:05:35,034 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:35,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:35,072 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:05:35,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:114 [2021-01-06 11:05:36,115 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 35 [2021-01-06 11:05:36,118 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:36,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:36,126 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 11:05:36,126 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:111, output treesize:9 [2021-01-06 11:05:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:36,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:36,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-01-06 11:05:36,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742233250] [2021-01-06 11:05:36,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 11:05:36,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:36,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 11:05:36,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 11:05:36,287 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand 50 states. [2021-01-06 11:05:37,525 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-01-06 11:05:37,898 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 11:05:38,723 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 32 [2021-01-06 11:05:38,997 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-01-06 11:05:39,443 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-01-06 11:05:40,163 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-01-06 11:05:40,407 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 37 [2021-01-06 11:05:40,728 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 42 [2021-01-06 11:05:40,979 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-01-06 11:05:41,177 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-01-06 11:05:41,472 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2021-01-06 11:05:41,731 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-01-06 11:05:41,981 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-01-06 11:05:42,387 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 60 [2021-01-06 11:05:42,588 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-01-06 11:05:42,929 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-01-06 11:05:45,158 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-01-06 11:05:45,591 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-01-06 11:05:45,812 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-01-06 11:05:46,003 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-01-06 11:05:46,272 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-01-06 11:05:46,528 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-01-06 11:05:46,817 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-01-06 11:05:47,259 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-01-06 11:05:47,491 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 11:05:47,772 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-01-06 11:05:48,129 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-01-06 11:05:48,418 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-01-06 11:05:48,599 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-01-06 11:05:48,880 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-01-06 11:05:49,158 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-01-06 11:05:49,443 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-01-06 11:05:49,863 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-01-06 11:05:50,057 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-01-06 11:05:50,294 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-01-06 11:05:50,574 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-01-06 11:05:51,206 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-01-06 11:05:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:51,583 INFO L93 Difference]: Finished difference Result 220 states and 265 transitions. [2021-01-06 11:05:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 11:05:51,584 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 47 [2021-01-06 11:05:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:51,585 INFO L225 Difference]: With dead ends: 220 [2021-01-06 11:05:51,586 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 11:05:51,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3474 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1085, Invalid=10471, Unknown=0, NotChecked=0, Total=11556 [2021-01-06 11:05:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 11:05:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 130. [2021-01-06 11:05:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 11:05:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-01-06 11:05:51,609 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 47 [2021-01-06 11:05:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:51,609 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-01-06 11:05:51,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 11:05:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-01-06 11:05:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:05:51,610 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:51,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:51,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:05:51,811 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash -246673324, now seen corresponding path program 5 times [2021-01-06 11:05:51,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:51,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587890376] [2021-01-06 11:05:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:53,040 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-01-06 11:05:53,385 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-01-06 11:05:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:54,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587890376] [2021-01-06 11:05:54,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846055733] [2021-01-06 11:05:54,178 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 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 11:05:54,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 11:05:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 11:05:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:54,338 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 10 treesize of output 8 [2021-01-06 11:05:54,343 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:54,359 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:54,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:54,360 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 11:05:55,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:05:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:55,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:55,419 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 54 [2021-01-06 11:05:55,422 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:55,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:55,462 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:55,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:67 [2021-01-06 11:05:55,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:55,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:05:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:55,787 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2021-01-06 11:05:55,790 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:55,851 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:55,852 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:05:55,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:97, output treesize:93 [2021-01-06 11:05:56,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:56,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:05:56,223 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 70 [2021-01-06 11:05:56,226 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:56,261 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:56,263 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:05:56,263 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:98 [2021-01-06 11:05:57,414 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 33 [2021-01-06 11:05:57,418 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:05:57,424 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:05:57,426 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 11:05:57,427 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:3 [2021-01-06 11:05:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:57,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:57,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-01-06 11:05:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794740116] [2021-01-06 11:05:57,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 11:05:57,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 11:05:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 11:05:57,541 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 50 states. [2021-01-06 11:05:58,945 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 11:05:59,339 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-01-06 11:05:59,744 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-01-06 11:06:00,054 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2021-01-06 11:06:00,366 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-01-06 11:06:00,891 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-01-06 11:06:01,420 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-01-06 11:06:01,741 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-01-06 11:06:02,073 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2021-01-06 11:06:02,537 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2021-01-06 11:06:03,144 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2021-01-06 11:06:03,439 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-01-06 11:06:05,984 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-01-06 11:06:06,297 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-01-06 11:06:08,245 WARN L197 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-01-06 11:06:10,435 WARN L197 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-01-06 11:06:10,850 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-01-06 11:06:11,055 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-01-06 11:06:11,351 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-01-06 11:06:11,624 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-01-06 11:06:11,870 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-01-06 11:06:12,104 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-01-06 11:06:12,536 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-01-06 11:06:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:12,613 INFO L93 Difference]: Finished difference Result 173 states and 209 transitions. [2021-01-06 11:06:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 11:06:12,613 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 47 [2021-01-06 11:06:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:12,615 INFO L225 Difference]: With dead ends: 173 [2021-01-06 11:06:12,616 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 11:06:12,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=692, Invalid=6790, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 11:06:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 11:06:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2021-01-06 11:06:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 11:06:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 152 transitions. [2021-01-06 11:06:12,640 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 152 transitions. Word has length 47 [2021-01-06 11:06:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:12,641 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 152 transitions. [2021-01-06 11:06:12,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 11:06:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 152 transitions. [2021-01-06 11:06:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:06:12,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:12,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:12,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:12,843 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:12,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2048869074, now seen corresponding path program 6 times [2021-01-06 11:06:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:12,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591562402] [2021-01-06 11:06:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:14,287 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-01-06 11:06:14,464 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-01-06 11:06:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:15,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591562402] [2021-01-06 11:06:15,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634451494] [2021-01-06 11:06:15,462 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 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 11:06:15,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 11:06:15,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 11:06:15,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:15,760 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:15,761 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-01-06 11:06:15,764 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:15,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:15,789 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:06:15,789 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:25 [2021-01-06 11:06:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:06:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:17,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:17,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:17,664 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-01-06 11:06:17,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:17,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:17,714 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:06:17,714 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:85 [2021-01-06 11:06:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,142 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:18,143 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 101 [2021-01-06 11:06:18,146 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:18,268 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-01-06 11:06:18,270 INFO L625 ElimStorePlain]: treesize reduction 48, result has 66.2 percent of original size [2021-01-06 11:06:18,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:06:18,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:94 [2021-01-06 11:06:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:06:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:06:18,739 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 81 [2021-01-06 11:06:18,741 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:18,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:18,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:06:18,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:140, output treesize:133 [2021-01-06 11:06:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:20,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:06:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:20,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:20,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:06:20,102 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 31 [2021-01-06 11:06:20,108 INFO L547 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:06:20,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:20,140 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 11:06:20,141 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:137, output treesize:21 [2021-01-06 11:06:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:20,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:20,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-01-06 11:06:20,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278865129] [2021-01-06 11:06:20,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 11:06:20,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:20,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 11:06:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2762, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:06:20,368 INFO L87 Difference]: Start difference. First operand 123 states and 152 transitions. Second operand 55 states. [2021-01-06 11:06:21,207 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-01-06 11:06:21,872 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-01-06 11:06:23,708 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-01-06 11:06:23,968 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-01-06 11:06:24,789 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-01-06 11:06:25,033 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-01-06 11:06:25,389 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-01-06 11:06:25,822 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2021-01-06 11:06:26,329 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2021-01-06 11:06:26,759 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 48 [2021-01-06 11:06:29,489 WARN L197 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 127 DAG size of output: 61 [2021-01-06 11:06:30,093 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-01-06 11:06:30,311 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 11:06:30,958 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-01-06 11:06:31,347 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-01-06 11:06:31,645 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-01-06 11:06:32,010 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2021-01-06 11:06:32,351 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-01-06 11:06:34,787 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-01-06 11:06:35,076 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-01-06 11:06:36,828 WARN L197 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2021-01-06 11:06:37,162 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-01-06 11:06:37,527 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-01-06 11:06:37,885 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-01-06 11:06:38,218 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-01-06 11:06:38,420 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-01-06 11:06:38,889 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-01-06 11:06:39,089 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-01-06 11:06:39,418 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-01-06 11:06:39,809 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-01-06 11:06:40,032 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-01-06 11:06:40,353 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 11:06:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:40,547 INFO L93 Difference]: Finished difference Result 250 states and 301 transitions. [2021-01-06 11:06:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 11:06:40,547 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 47 [2021-01-06 11:06:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:40,548 INFO L225 Difference]: With dead ends: 250 [2021-01-06 11:06:40,548 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 11:06:40,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=1020, Invalid=10536, Unknown=0, NotChecked=0, Total=11556 [2021-01-06 11:06:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 11:06:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 146. [2021-01-06 11:06:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 11:06:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2021-01-06 11:06:40,577 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 47 [2021-01-06 11:06:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:40,577 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2021-01-06 11:06:40,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 11:06:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2021-01-06 11:06:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:06:40,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:40,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:40,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:06:40,779 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:40,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2027243504, now seen corresponding path program 7 times [2021-01-06 11:06:40,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:40,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509901307] [2021-01-06 11:06:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:41,818 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-01-06 11:06:42,264 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-01-06 11:06:42,501 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-01-06 11:06:42,703 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-01-06 11:06:42,898 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-01-06 11:06:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:43,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509901307] [2021-01-06 11:06:43,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40579272] [2021-01-06 11:06:43,817 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 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 11:06:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 11:06:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:44,210 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 10 treesize of output 8 [2021-01-06 11:06:44,213 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:44,239 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:44,240 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:06:44,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 11:06:45,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:06:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:45,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:45,754 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 62 [2021-01-06 11:06:45,757 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:45,811 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:45,812 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:06:45,813 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:98 [2021-01-06 11:06:46,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:46,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:46,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:06:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:46,274 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 85 [2021-01-06 11:06:46,277 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:46,356 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:46,358 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:06:46,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:129, output treesize:130 [2021-01-06 11:06:46,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:46,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:46,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:06:46,867 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 78 [2021-01-06 11:06:46,870 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:46,919 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:06:46,921 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:06:46,922 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:123, output treesize:108 [2021-01-06 11:06:48,324 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2021-01-06 11:06:48,329 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:06:48,351 INFO L625 ElimStorePlain]: treesize reduction 9, result has 60.9 percent of original size [2021-01-06 11:06:48,353 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 11:06:48,353 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:111, output treesize:9 [2021-01-06 11:06:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:06:48,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:48,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 54 [2021-01-06 11:06:48,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759923773] [2021-01-06 11:06:48,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 11:06:48,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:48,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 11:06:48,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2679, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 11:06:48,585 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand 54 states. [2021-01-06 11:06:50,099 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-01-06 11:06:51,168 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-01-06 11:06:51,625 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-06 11:06:52,465 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2021-01-06 11:06:52,826 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 11:06:53,088 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-01-06 11:06:53,518 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 11:06:53,832 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-01-06 11:06:54,312 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-01-06 11:06:54,626 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-01-06 11:06:54,997 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-01-06 11:06:55,530 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-01-06 11:06:55,899 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-01-06 11:06:56,230 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-01-06 11:06:56,617 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-01-06 11:06:57,007 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2021-01-06 11:06:57,392 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-01-06 11:06:58,003 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2021-01-06 11:06:58,343 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-01-06 11:06:58,866 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 45 [2021-01-06 11:06:59,334 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-01-06 11:06:59,824 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 62 [2021-01-06 11:07:00,202 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-01-06 11:07:00,639 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-01-06 11:07:01,086 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2021-01-06 11:07:03,579 WARN L197 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2021-01-06 11:07:04,095 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-01-06 11:07:04,324 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-01-06 11:07:04,632 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-01-06 11:07:05,033 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2021-01-06 11:07:05,481 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-01-06 11:07:05,863 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-01-06 11:07:06,127 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-01-06 11:07:06,521 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-01-06 11:07:07,126 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-01-06 11:07:07,326 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-01-06 11:07:07,868 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-01-06 11:07:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:08,020 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2021-01-06 11:07:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 11:07:08,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 47 [2021-01-06 11:07:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:08,021 INFO L225 Difference]: With dead ends: 261 [2021-01-06 11:07:08,021 INFO L226 Difference]: Without dead ends: 255 [2021-01-06 11:07:08,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=944, Invalid=11266, Unknown=0, NotChecked=0, Total=12210 [2021-01-06 11:07:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-01-06 11:07:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 153. [2021-01-06 11:07:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 11:07:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2021-01-06 11:07:08,050 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 47 [2021-01-06 11:07:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:08,050 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2021-01-06 11:07:08,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 11:07:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2021-01-06 11:07:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:07:08,051 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:08,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:08,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:08,255 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash -859894828, now seen corresponding path program 8 times [2021-01-06 11:07:08,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:08,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255434889] [2021-01-06 11:07:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:08,983 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-01-06 11:07:09,121 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 11:07:09,268 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-01-06 11:07:09,548 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-01-06 11:07:09,741 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 11:07:09,971 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-01-06 11:07:10,196 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-01-06 11:07:10,407 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-01-06 11:07:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:07:11,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255434889] [2021-01-06 11:07:11,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388487692] [2021-01-06 11:07:11,385 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 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 11:07:11,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:07:11,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 11:07:11,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:11,553 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:11,553 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-01-06 11:07:11,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:11,577 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:11,578 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:07:11,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-01-06 11:07:13,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:07:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:13,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:13,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:13,098 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-01-06 11:07:13,101 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:13,156 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:13,157 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:07:13,158 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:81 [2021-01-06 11:07:13,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:13,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:07:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:13,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:13,556 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2021-01-06 11:07:13,558 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:13,626 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:13,627 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:07:13,628 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:92 [2021-01-06 11:07:14,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:14,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:14,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:14,065 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 70 [2021-01-06 11:07:14,069 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:14,114 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:14,116 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:07:14,116 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:105, output treesize:98 [2021-01-06 11:07:15,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 31 [2021-01-06 11:07:15,450 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:15,460 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:15,463 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 11:07:15,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:9 [2021-01-06 11:07:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:07:15,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:15,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 52 [2021-01-06 11:07:15,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188078633] [2021-01-06 11:07:15,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 11:07:15,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:15,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 11:07:15,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2441, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 11:07:15,684 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand 52 states. [2021-01-06 11:07:16,358 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-01-06 11:07:16,664 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-01-06 11:07:16,932 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-01-06 11:07:17,637 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 11:07:18,119 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-01-06 11:07:18,555 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-01-06 11:07:18,859 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-01-06 11:07:19,149 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2021-01-06 11:07:19,444 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-01-06 11:07:19,837 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-01-06 11:07:20,104 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-01-06 11:07:20,528 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-01-06 11:07:20,931 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 40 [2021-01-06 11:07:21,339 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2021-01-06 11:07:21,766 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2021-01-06 11:07:24,332 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2021-01-06 11:07:24,703 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-01-06 11:07:25,083 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-01-06 11:07:25,456 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2021-01-06 11:07:25,835 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-01-06 11:07:28,174 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-01-06 11:07:28,408 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-01-06 11:07:30,808 WARN L197 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2021-01-06 11:07:31,354 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-01-06 11:07:31,623 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-01-06 11:07:32,021 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-01-06 11:07:32,406 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-01-06 11:07:32,706 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-01-06 11:07:33,004 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-01-06 11:07:33,548 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-01-06 11:07:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:33,638 INFO L93 Difference]: Finished difference Result 250 states and 303 transitions. [2021-01-06 11:07:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 11:07:33,639 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 47 [2021-01-06 11:07:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:33,641 INFO L225 Difference]: With dead ends: 250 [2021-01-06 11:07:33,641 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 11:07:33,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=716, Invalid=7294, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 11:07:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 11:07:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 158. [2021-01-06 11:07:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 11:07:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 199 transitions. [2021-01-06 11:07:33,680 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 199 transitions. Word has length 47 [2021-01-06 11:07:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:33,680 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 199 transitions. [2021-01-06 11:07:33,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 11:07:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 199 transitions. [2021-01-06 11:07:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:07:33,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:33,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:33,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:33,897 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash -641040110, now seen corresponding path program 3 times [2021-01-06 11:07:33,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:33,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620613383] [2021-01-06 11:07:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:34,635 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-01-06 11:07:34,796 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-01-06 11:07:34,951 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-01-06 11:07:35,110 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-01-06 11:07:35,422 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-01-06 11:07:35,617 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-01-06 11:07:35,854 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-01-06 11:07:36,084 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-01-06 11:07:36,295 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-01-06 11:07:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:07:37,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620613383] [2021-01-06 11:07:37,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292591202] [2021-01-06 11:07:37,360 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 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 11:07:37,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:07:37,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:37,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 11:07:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:37,730 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:37,730 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-01-06 11:07:37,735 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:37,767 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:37,769 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:07:37,769 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:25 [2021-01-06 11:07:40,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:07:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:40,102 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:40,102 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 92 [2021-01-06 11:07:40,105 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:40,272 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-01-06 11:07:40,274 INFO L625 ElimStorePlain]: treesize reduction 63, result has 58.3 percent of original size [2021-01-06 11:07:40,276 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:07:40,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:88 [2021-01-06 11:07:40,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:40,931 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:40,931 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 136 [2021-01-06 11:07:40,936 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:41,159 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-01-06 11:07:41,160 INFO L625 ElimStorePlain]: treesize reduction 104, result has 48.3 percent of original size [2021-01-06 11:07:41,163 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 11:07:41,163 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:97 [2021-01-06 11:07:41,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:41,894 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:41,894 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 145 [2021-01-06 11:07:41,907 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:07:42,117 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-01-06 11:07:42,119 INFO L625 ElimStorePlain]: treesize reduction 126, result has 51.9 percent of original size [2021-01-06 11:07:42,123 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 11:07:42,123 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:146, output treesize:136 [2021-01-06 11:07:43,613 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-01-06 11:07:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:44,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:44,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:07:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 11:07:44,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 11:07:44,346 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:07:44,347 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 66 [2021-01-06 11:07:44,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 11:07:44,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,361 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:44,414 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 11:07:44,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,416 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:44,420 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-01-06 11:07:44,595 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-01-06 11:07:44,597 INFO L625 ElimStorePlain]: treesize reduction 77, result has 40.3 percent of original size [2021-01-06 11:07:44,602 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:07:44,602 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:137, output treesize:40 [2021-01-06 11:07:44,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:45,115 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 11:07:45,117 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 11:07:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:07:45,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:45,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 58 [2021-01-06 11:07:45,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981096662] [2021-01-06 11:07:45,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 11:07:45,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 11:07:45,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 11:07:45,401 INFO L87 Difference]: Start difference. First operand 158 states and 199 transitions. Second operand 58 states. [2021-01-06 11:07:46,473 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-01-06 11:07:46,751 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-01-06 11:07:47,035 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-01-06 11:07:47,362 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-06 11:07:48,447 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-01-06 11:07:49,026 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-01-06 11:07:49,523 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-01-06 11:07:49,942 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-01-06 11:07:50,516 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-01-06 11:07:51,025 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-01-06 11:07:51,535 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-01-06 11:07:52,114 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-01-06 11:07:52,681 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-01-06 11:07:53,099 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-01-06 11:07:55,712 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-01-06 11:07:56,400 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2021-01-06 11:08:01,127 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 53 [2021-01-06 11:08:01,712 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-01-06 11:08:02,373 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2021-01-06 11:08:05,321 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 74