/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:07:20,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:07:20,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:07:20,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:07:20,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:07:20,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:07:20,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:07:20,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:07:20,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:07:20,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:07:20,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:07:20,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:07:20,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:07:20,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:07:20,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:07:20,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:07:20,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:07:20,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:07:20,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:07:20,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:07:20,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:07:20,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:07:20,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:07:20,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:07:20,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:07:20,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:07:20,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:07:20,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:07:20,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:07:20,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:07:20,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:07:20,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:07:20,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:07:20,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:07:20,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:07:20,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:07:20,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:07:20,849 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:07:20,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:07:20,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:07:20,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:07:20,852 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:07:20,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:07:20,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:07:20,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:07:20,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:07:20,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:07:20,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:07:20,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:07:20,854 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:07:20,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:07:20,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:07:20,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:07:20,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:07:20,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:07:20,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:07:20,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:07:20,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:07:20,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:07:20,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:07:20,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:07:20,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:07:20,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:07:21,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:07:21,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:07:21,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:07:21,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:07:21,274 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:07:21,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2020-12-23 01:07:21,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6d1e57904/2bf362bdd4c541e08f8d331aec27eda9/FLAG71c1f8cd6 [2020-12-23 01:07:22,023 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:07:22,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2020-12-23 01:07:22,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6d1e57904/2bf362bdd4c541e08f8d331aec27eda9/FLAG71c1f8cd6 [2020-12-23 01:07:22,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6d1e57904/2bf362bdd4c541e08f8d331aec27eda9 [2020-12-23 01:07:22,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:07:22,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:07:22,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:07:22,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:07:22,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:07:22,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8ff40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22, skipping insertion in model container [2020-12-23 01:07:22,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:07:22,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:07:22,622 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:07:22,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:07:22,655 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:07:22,672 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 01:07:22,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:07:22,699 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:07:22,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22 WrapperNode [2020-12-23 01:07:22,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:07:22,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:07:22,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:07:22,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:07:22,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:07:22,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:07:22,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:07:22,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:07:22,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (1/1) ... [2020-12-23 01:07:22,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:07:22,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:07:22,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:07:22,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:07:22,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (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 [2020-12-23 01:07:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:07:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:07:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:07:22,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:07:23,437 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:07:23,437 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 01:07:23,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:07:23 BoogieIcfgContainer [2020-12-23 01:07:23,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:07:23,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:07:23,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:07:23,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:07:23,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:07:22" (1/3) ... [2020-12-23 01:07:23,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f704f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:07:23, skipping insertion in model container [2020-12-23 01:07:23,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:07:22" (2/3) ... [2020-12-23 01:07:23,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f704f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:07:23, skipping insertion in model container [2020-12-23 01:07:23,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:07:23" (3/3) ... [2020-12-23 01:07:23,464 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2020-12-23 01:07:23,484 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:07:23,493 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:07:23,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:07:23,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:07:23,570 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:07:23,570 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:07:23,570 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:07:23,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:07:23,571 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:07:23,571 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:07:23,571 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:07:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 01:07:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:07:23,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:23,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:23,604 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash 345788098, now seen corresponding path program 1 times [2020-12-23 01:07:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:23,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101346857] [2020-12-23 01:07:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:23,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101346857] [2020-12-23 01:07:23,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:07:23,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:07:23,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573478651] [2020-12-23 01:07:23,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:07:23,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:07:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:07:23,915 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 01:07:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:23,936 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-23 01:07:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:07:23,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 01:07:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:23,956 INFO L225 Difference]: With dead ends: 39 [2020-12-23 01:07:23,956 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 01:07:23,961 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 [2020-12-23 01:07:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 01:07:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 01:07:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 01:07:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 01:07:24,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2020-12-23 01:07:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:24,001 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 01:07:24,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:07:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 01:07:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:07:24,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:24,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:24,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:07:24,003 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:24,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1506119239, now seen corresponding path program 1 times [2020-12-23 01:07:24,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:24,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018755217] [2020-12-23 01:07:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:24,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018755217] [2020-12-23 01:07:24,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:07:24,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 01:07:24,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242508651] [2020-12-23 01:07:24,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:07:24,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:24,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:07:24,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:07:24,134 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-12-23 01:07:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:24,189 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-23 01:07:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:07:24,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 01:07:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:24,191 INFO L225 Difference]: With dead ends: 35 [2020-12-23 01:07:24,191 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 01:07:24,192 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 [2020-12-23 01:07:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 01:07:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2020-12-23 01:07:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:07:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 01:07:24,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2020-12-23 01:07:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:24,198 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 01:07:24,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:07:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 01:07:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 01:07:24,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:24,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:24,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:07:24,200 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash 631202802, now seen corresponding path program 1 times [2020-12-23 01:07:24,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:24,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53604588] [2020-12-23 01:07:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:24,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53604588] [2020-12-23 01:07:24,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612807537] [2020-12-23 01:07:24,610 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 [2020-12-23 01:07:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:07:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:25,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:07:25,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:25,037 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:25,048 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:25,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:07:25,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:25,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:25,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:25,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:25,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 01:07:25,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128596583] [2020-12-23 01:07:25,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:07:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:07:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:07:25,170 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 18 states. [2020-12-23 01:07:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:25,727 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-23 01:07:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:07:25,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-12-23 01:07:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:25,729 INFO L225 Difference]: With dead ends: 44 [2020-12-23 01:07:25,729 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 01:07:25,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:07:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 01:07:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2020-12-23 01:07:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:07:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 01:07:25,739 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2020-12-23 01:07:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:25,739 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 01:07:25,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:07:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 01:07:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:07:25,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:25,741 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:25,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 01:07:25,955 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash -948870232, now seen corresponding path program 1 times [2020-12-23 01:07:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:25,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115968438] [2020-12-23 01:07:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:26,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115968438] [2020-12-23 01:07:26,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226342749] [2020-12-23 01:07:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:26,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:07:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:26,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:26,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 01:07:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334228989] [2020-12-23 01:07:26,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:07:26,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:26,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:07:26,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:07:26,168 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-12-23 01:07:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:26,235 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-23 01:07:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:07:26,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 01:07:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:26,237 INFO L225 Difference]: With dead ends: 49 [2020-12-23 01:07:26,237 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 01:07:26,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:07:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 01:07:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-12-23 01:07:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 01:07:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 01:07:26,243 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-12-23 01:07:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:26,243 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 01:07:26,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:07:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 01:07:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:07:26,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:26,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:26,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:26,459 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1470197333, now seen corresponding path program 2 times [2020-12-23 01:07:26,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:26,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158504899] [2020-12-23 01:07:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:26,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158504899] [2020-12-23 01:07:26,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54197907] [2020-12-23 01:07:26,761 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 [2020-12-23 01:07:26,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:07:26,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:07:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:26,970 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:07:26,971 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:27,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:27,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:27,006 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:07:27,145 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:27,146 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 41 treesize of output 67 [2020-12-23 01:07:27,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:27,158 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:27,191 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:07:27,195 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:27,195 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:07:27,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:27,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:27,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:27,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 01:07:27,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608084308] [2020-12-23 01:07:27,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:07:27,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:27,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:07:27,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:07:27,287 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 22 states. [2020-12-23 01:07:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:27,740 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-12-23 01:07:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:07:27,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2020-12-23 01:07:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:27,742 INFO L225 Difference]: With dead ends: 29 [2020-12-23 01:07:27,742 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 01:07:27,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-12-23 01:07:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 01:07:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-23 01:07:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:07:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 01:07:27,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-12-23 01:07:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:27,748 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 01:07:27,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:07:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 01:07:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:07:27,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:27,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:27,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:27,959 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:27,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1459686625, now seen corresponding path program 2 times [2020-12-23 01:07:27,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:27,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412227102] [2020-12-23 01:07:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412227102] [2020-12-23 01:07:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704520574] [2020-12-23 01:07:28,243 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:28,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:07:28,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 01:07:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:28,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:07:28,473 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:28,481 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:28,484 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:28,484 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:07:28,597 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:28,600 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:28,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:28,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 01:07:28,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778463612] [2020-12-23 01:07:28,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 01:07:28,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 01:07:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:07:28,625 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 24 states. [2020-12-23 01:07:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:29,288 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-23 01:07:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:07:29,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2020-12-23 01:07:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:29,290 INFO L225 Difference]: With dead ends: 56 [2020-12-23 01:07:29,290 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:07:29,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:07:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:07:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2020-12-23 01:07:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 01:07:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 01:07:29,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2020-12-23 01:07:29,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:29,298 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 01:07:29,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 01:07:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 01:07:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:07:29,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:29,300 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:29,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:29,514 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:29,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1394148073, now seen corresponding path program 3 times [2020-12-23 01:07:29,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:29,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275418526] [2020-12-23 01:07:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275418526] [2020-12-23 01:07:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525302505] [2020-12-23 01:07:29,627 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:29,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 01:07:29,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:07:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:29,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:29,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 01:07:29,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082137795] [2020-12-23 01:07:29,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:07:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:29,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:07:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:07:29,791 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-12-23 01:07:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:29,894 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-23 01:07:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:07:29,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-23 01:07:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:29,898 INFO L225 Difference]: With dead ends: 61 [2020-12-23 01:07:29,898 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 01:07:29,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:07:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 01:07:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2020-12-23 01:07:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:07:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 01:07:29,916 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 27 [2020-12-23 01:07:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:29,917 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 01:07:29,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:07:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 01:07:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:07:29,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:29,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:30,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 01:07:30,134 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:30,135 INFO L82 PathProgramCache]: Analyzing trace with hash -675843686, now seen corresponding path program 4 times [2020-12-23 01:07:30,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:30,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057011767] [2020-12-23 01:07:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:30,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057011767] [2020-12-23 01:07:30,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931673922] [2020-12-23 01:07:30,406 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:30,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:07:30,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 01:07:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:30,652 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:07:30,653 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:30,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:30,666 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:30,666 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:07:30,792 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:30,793 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 41 treesize of output 67 [2020-12-23 01:07:30,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:30,798 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:30,828 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:07:30,830 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:30,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:07:30,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:30,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:30,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:30,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-23 01:07:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582102544] [2020-12-23 01:07:30,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:07:30,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:07:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:07:30,995 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 28 states. [2020-12-23 01:07:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:31,610 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 01:07:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:07:31,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2020-12-23 01:07:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:31,611 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:07:31,611 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 01:07:31,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=1403, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 01:07:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 01:07:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-12-23 01:07:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:07:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 01:07:31,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-12-23 01:07:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:31,618 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 01:07:31,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:07:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 01:07:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:07:31,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:31,620 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:31,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:31,834 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1845124432, now seen corresponding path program 5 times [2020-12-23 01:07:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:31,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994342589] [2020-12-23 01:07:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994342589] [2020-12-23 01:07:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224000343] [2020-12-23 01:07:32,231 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:32,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 01:07:32,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:32,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 01:07:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:32,539 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:07:32,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:32,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:32,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:32,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:22 [2020-12-23 01:07:32,677 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:32,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:32,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:32,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:32,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-23 01:07:32,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516766655] [2020-12-23 01:07:32,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:07:32,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:32,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:07:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:07:32,710 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2020-12-23 01:07:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:33,699 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-23 01:07:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:07:33,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2020-12-23 01:07:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:33,701 INFO L225 Difference]: With dead ends: 68 [2020-12-23 01:07:33,702 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 01:07:33,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:07:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 01:07:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-12-23 01:07:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 01:07:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-12-23 01:07:33,710 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2020-12-23 01:07:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:33,711 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-12-23 01:07:33,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:07:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-12-23 01:07:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:07:33,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:33,712 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:33,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:33,924 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:33,925 INFO L82 PathProgramCache]: Analyzing trace with hash 215252486, now seen corresponding path program 6 times [2020-12-23 01:07:33,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:33,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335280722] [2020-12-23 01:07:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:34,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335280722] [2020-12-23 01:07:34,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656713390] [2020-12-23 01:07:34,019 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:34,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 01:07:34,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:07:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:34,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:34,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 01:07:34,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733199558] [2020-12-23 01:07:34,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:07:34,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:07:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:07:34,191 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-12-23 01:07:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:34,319 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-23 01:07:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:07:34,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-23 01:07:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:34,321 INFO L225 Difference]: With dead ends: 73 [2020-12-23 01:07:34,321 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 01:07:34,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:07:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 01:07:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-12-23 01:07:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 01:07:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 01:07:34,328 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 35 [2020-12-23 01:07:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:34,328 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 01:07:34,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:07:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 01:07:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:07:34,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:34,329 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:34,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 01:07:34,542 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:34,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:34,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1182729975, now seen corresponding path program 7 times [2020-12-23 01:07:34,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:34,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483062009] [2020-12-23 01:07:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:35,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483062009] [2020-12-23 01:07:35,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445424690] [2020-12-23 01:07:35,017 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 01:07:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:35,344 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:07:35,345 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:35,356 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:35,357 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:35,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:40 [2020-12-23 01:07:35,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:07:35,482 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2020-12-23 01:07:35,485 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:35,497 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:35,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:35,501 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:22 [2020-12-23 01:07:35,641 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:35,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:35,645 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:35,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:35,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-12-23 01:07:35,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56255145] [2020-12-23 01:07:35,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:07:35,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:07:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:07:35,677 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 31 states. [2020-12-23 01:07:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:36,606 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-12-23 01:07:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:07:36,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-23 01:07:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:36,608 INFO L225 Difference]: With dead ends: 50 [2020-12-23 01:07:36,608 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 01:07:36,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 01:07:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 01:07:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-12-23 01:07:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:07:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-23 01:07:36,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2020-12-23 01:07:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:36,617 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-23 01:07:36,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:07:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-23 01:07:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 01:07:36,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:36,618 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:36,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:36,833 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1211853505, now seen corresponding path program 8 times [2020-12-23 01:07:36,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:36,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587974188] [2020-12-23 01:07:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:37,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587974188] [2020-12-23 01:07:37,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790260432] [2020-12-23 01:07:37,113 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:37,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:07:37,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 01:07:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:37,498 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:07:37,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:37,507 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:37,511 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:37,511 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:07:37,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:37,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:37,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:37,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 01:07:37,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466930608] [2020-12-23 01:07:37,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 01:07:37,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 01:07:37,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:07:37,754 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 32 states. [2020-12-23 01:07:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:38,936 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-12-23 01:07:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 01:07:38,936 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2020-12-23 01:07:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:38,938 INFO L225 Difference]: With dead ends: 80 [2020-12-23 01:07:38,938 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 01:07:38,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=426, Invalid=2436, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 01:07:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 01:07:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-12-23 01:07:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 01:07:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-23 01:07:38,948 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 39 [2020-12-23 01:07:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:38,948 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-23 01:07:38,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 01:07:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-23 01:07:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:07:38,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:38,949 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:39,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:39,161 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:39,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1976772213, now seen corresponding path program 9 times [2020-12-23 01:07:39,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:39,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326400020] [2020-12-23 01:07:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326400020] [2020-12-23 01:07:39,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572785060] [2020-12-23 01:07:39,260 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:39,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 01:07:39,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:07:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:39,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:39,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 01:07:39,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788176928] [2020-12-23 01:07:39,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:07:39,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:39,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:07:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:07:39,483 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-12-23 01:07:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:39,639 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-12-23 01:07:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:07:39,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-12-23 01:07:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:39,641 INFO L225 Difference]: With dead ends: 85 [2020-12-23 01:07:39,641 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 01:07:39,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:07:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 01:07:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-12-23 01:07:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 01:07:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 01:07:39,648 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 43 [2020-12-23 01:07:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:39,648 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 01:07:39,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:07:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 01:07:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:07:39,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:39,649 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:39,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:07:39,865 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1309382664, now seen corresponding path program 10 times [2020-12-23 01:07:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:39,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944736391] [2020-12-23 01:07:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:40,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944736391] [2020-12-23 01:07:40,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381199355] [2020-12-23 01:07:40,209 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:40,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:07:40,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 01:07:40,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:40,559 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:07:40,560 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:40,570 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:40,572 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:40,572 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:07:40,710 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:40,711 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 41 treesize of output 67 [2020-12-23 01:07:40,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:40,715 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:40,741 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:07:40,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:40,745 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:07:40,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:40,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:41,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:41,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-12-23 01:07:41,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373397657] [2020-12-23 01:07:41,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 01:07:41,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:41,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 01:07:41,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:07:41,037 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 36 states. [2020-12-23 01:07:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:42,100 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 01:07:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 01:07:42,101 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-12-23 01:07:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:42,102 INFO L225 Difference]: With dead ends: 58 [2020-12-23 01:07:42,102 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 01:07:42,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=463, Invalid=2617, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:07:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 01:07:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-12-23 01:07:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:07:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 01:07:42,110 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2020-12-23 01:07:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:42,110 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 01:07:42,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 01:07:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 01:07:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 01:07:42,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:42,112 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:42,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:07:42,322 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1509487790, now seen corresponding path program 11 times [2020-12-23 01:07:42,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:42,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145437036] [2020-12-23 01:07:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:42,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145437036] [2020-12-23 01:07:42,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450641960] [2020-12-23 01:07:42,635 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:42,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:07:42,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 01:07:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:43,038 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:07:43,039 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:43,048 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:43,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:43,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:07:43,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:43,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:43,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:43,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:43,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2020-12-23 01:07:43,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72489779] [2020-12-23 01:07:43,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 01:07:43,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:43,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 01:07:43,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 01:07:43,331 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 35 states. [2020-12-23 01:07:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:44,797 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-12-23 01:07:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 01:07:44,798 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 47 [2020-12-23 01:07:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:44,799 INFO L225 Difference]: With dead ends: 92 [2020-12-23 01:07:44,799 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 01:07:44,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=466, Invalid=2956, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 01:07:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 01:07:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2020-12-23 01:07:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 01:07:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-23 01:07:44,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-12-23 01:07:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:44,820 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-23 01:07:44,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 01:07:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-23 01:07:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:07:44,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:44,822 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:45,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 01:07:45,028 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash 517748324, now seen corresponding path program 12 times [2020-12-23 01:07:45,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:45,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706184757] [2020-12-23 01:07:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:45,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706184757] [2020-12-23 01:07:45,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136893682] [2020-12-23 01:07:45,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:45,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 01:07:45,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:45,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:07:45,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:45,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:45,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 01:07:45,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776186739] [2020-12-23 01:07:45,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:07:45,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:07:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:07:45,416 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-12-23 01:07:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:45,605 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-12-23 01:07:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:07:45,606 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-12-23 01:07:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:45,607 INFO L225 Difference]: With dead ends: 97 [2020-12-23 01:07:45,607 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 01:07:45,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:07:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 01:07:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-12-23 01:07:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:07:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 01:07:45,615 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 51 [2020-12-23 01:07:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:45,615 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 01:07:45,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:07:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 01:07:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:07:45,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:45,617 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:45,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:45,832 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash -39125401, now seen corresponding path program 13 times [2020-12-23 01:07:45,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:45,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479934545] [2020-12-23 01:07:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:46,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479934545] [2020-12-23 01:07:46,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590826485] [2020-12-23 01:07:46,183 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 01:07:46,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:46,618 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:07:46,619 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:46,628 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:46,630 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:46,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:07:46,773 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:46,774 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 41 treesize of output 67 [2020-12-23 01:07:46,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:46,778 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:46,808 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:07:46,811 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:46,811 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:07:47,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:47,085 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:47,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:47,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:47,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2020-12-23 01:07:47,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035583104] [2020-12-23 01:07:47,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 01:07:47,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 01:07:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:07:47,144 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 39 states. [2020-12-23 01:07:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:48,442 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-12-23 01:07:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 01:07:48,442 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 51 [2020-12-23 01:07:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:48,443 INFO L225 Difference]: With dead ends: 66 [2020-12-23 01:07:48,443 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 01:07:48,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=2957, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 01:07:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 01:07:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-12-23 01:07:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:07:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-23 01:07:48,452 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2020-12-23 01:07:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:48,452 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-23 01:07:48,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 01:07:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-23 01:07:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 01:07:48,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:48,453 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:48,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:07:48,663 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:48,664 INFO L82 PathProgramCache]: Analyzing trace with hash 579910557, now seen corresponding path program 14 times [2020-12-23 01:07:48,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:48,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482288397] [2020-12-23 01:07:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:49,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482288397] [2020-12-23 01:07:49,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863039454] [2020-12-23 01:07:49,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:49,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:07:49,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 01:07:49,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:49,573 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:07:49,574 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:49,582 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:49,584 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:49,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:07:49,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:49,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:49,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:49,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-23 01:07:49,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544107603] [2020-12-23 01:07:49,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 01:07:49,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:49,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 01:07:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:07:49,962 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 40 states. [2020-12-23 01:07:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:51,792 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-12-23 01:07:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 01:07:51,792 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 55 [2020-12-23 01:07:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:51,793 INFO L225 Difference]: With dead ends: 104 [2020-12-23 01:07:51,794 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 01:07:51,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=548, Invalid=4008, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:07:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 01:07:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-12-23 01:07:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 01:07:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-12-23 01:07:51,803 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 55 [2020-12-23 01:07:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:51,803 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-12-23 01:07:51,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 01:07:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-12-23 01:07:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 01:07:51,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:51,804 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:52,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:07:52,020 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1219957293, now seen corresponding path program 15 times [2020-12-23 01:07:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:52,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404286876] [2020-12-23 01:07:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:52,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404286876] [2020-12-23 01:07:52,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110482889] [2020-12-23 01:07:52,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:52,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 01:07:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:07:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:52,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:52,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-23 01:07:52,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112933820] [2020-12-23 01:07:52,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:07:52,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:07:52,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:07:52,569 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 25 states. [2020-12-23 01:07:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:52,778 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-12-23 01:07:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:07:52,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-12-23 01:07:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:52,779 INFO L225 Difference]: With dead ends: 109 [2020-12-23 01:07:52,779 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 01:07:52,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:07:52,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 01:07:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-12-23 01:07:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:07:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 01:07:52,793 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 59 [2020-12-23 01:07:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:52,793 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 01:07:52,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:07:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 01:07:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 01:07:52,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:52,794 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:53,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:53,011 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2120352682, now seen corresponding path program 16 times [2020-12-23 01:07:53,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:53,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144514751] [2020-12-23 01:07:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144514751] [2020-12-23 01:07:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989941153] [2020-12-23 01:07:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:53,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:07:53,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 01:07:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:53,960 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:07:53,961 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:53,971 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:53,973 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:53,973 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:07:54,106 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:54,107 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 41 treesize of output 67 [2020-12-23 01:07:54,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:54,110 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:54,138 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:07:54,140 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:54,141 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:07:54,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:54,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:54,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:54,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-23 01:07:54,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273977654] [2020-12-23 01:07:54,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 01:07:54,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 01:07:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:07:54,604 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 44 states. [2020-12-23 01:07:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:56,103 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-12-23 01:07:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 01:07:56,103 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 59 [2020-12-23 01:07:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:56,104 INFO L225 Difference]: With dead ends: 74 [2020-12-23 01:07:56,105 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 01:07:56,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=569, Invalid=3987, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:07:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 01:07:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-12-23 01:07:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 01:07:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-23 01:07:56,115 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2020-12-23 01:07:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:56,116 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-23 01:07:56,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 01:07:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-23 01:07:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 01:07:56,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:56,117 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:07:56,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:56,332 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:07:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:07:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1474636300, now seen corresponding path program 17 times [2020-12-23 01:07:56,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:07:56,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394287957] [2020-12-23 01:07:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:07:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:07:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:56,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394287957] [2020-12-23 01:07:56,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744573307] [2020-12-23 01:07:56,772 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:07:56,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 01:07:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:07:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 01:07:56,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:07:57,317 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:07:57,318 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:07:57,327 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:07:57,329 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:07:57,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:07:57,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:57,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:07:57,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:07:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:07:57,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:07:57,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2020-12-23 01:07:57,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310844480] [2020-12-23 01:07:57,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 01:07:57,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:07:57,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 01:07:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 01:07:57,801 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 43 states. [2020-12-23 01:07:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:07:59,963 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-12-23 01:07:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 01:07:59,964 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 63 [2020-12-23 01:07:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:07:59,965 INFO L225 Difference]: With dead ends: 116 [2020-12-23 01:07:59,965 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 01:07:59,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=588, Invalid=4668, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 01:07:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 01:07:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 73. [2020-12-23 01:07:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 01:07:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-23 01:07:59,975 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2020-12-23 01:07:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:07:59,975 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-23 01:07:59,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 01:07:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-23 01:07:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 01:07:59,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:07:59,976 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:00,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:00,181 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash 919768258, now seen corresponding path program 18 times [2020-12-23 01:08:00,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:00,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146007858] [2020-12-23 01:08:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:00,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146007858] [2020-12-23 01:08:00,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040638019] [2020-12-23 01:08:00,389 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:00,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 01:08:00,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:08:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:00,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:00,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 01:08:00,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485239844] [2020-12-23 01:08:00,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:08:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:08:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:08:00,870 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 28 states. [2020-12-23 01:08:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:01,126 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-12-23 01:08:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:08:01,127 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2020-12-23 01:08:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:01,128 INFO L225 Difference]: With dead ends: 121 [2020-12-23 01:08:01,128 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 01:08:01,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:08:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 01:08:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2020-12-23 01:08:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 01:08:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-23 01:08:01,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 67 [2020-12-23 01:08:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:01,139 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-23 01:08:01,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:08:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-23 01:08:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 01:08:01,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:01,140 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:01,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:08:01,350 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1691967035, now seen corresponding path program 19 times [2020-12-23 01:08:01,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:01,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362412464] [2020-12-23 01:08:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:01,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362412464] [2020-12-23 01:08:01,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921162437] [2020-12-23 01:08:01,836 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 01:08:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:02,430 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:08:02,431 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:02,443 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:02,444 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:02,444 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:08:02,599 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:02,600 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 41 treesize of output 67 [2020-12-23 01:08:02,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:02,604 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:02,641 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:08:02,645 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:02,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:08:03,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:03,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:03,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:03,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:03,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2020-12-23 01:08:03,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075603271] [2020-12-23 01:08:03,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 01:08:03,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:03,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 01:08:03,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 01:08:03,149 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 47 states. [2020-12-23 01:08:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:05,063 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-12-23 01:08:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 01:08:05,064 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 67 [2020-12-23 01:08:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:05,065 INFO L225 Difference]: With dead ends: 82 [2020-12-23 01:08:05,065 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 01:08:05,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=571, Invalid=4399, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 01:08:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 01:08:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-12-23 01:08:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:08:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 01:08:05,077 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2020-12-23 01:08:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:05,077 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 01:08:05,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 01:08:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 01:08:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 01:08:05,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:05,078 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:05,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 01:08:05,280 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2001764357, now seen corresponding path program 20 times [2020-12-23 01:08:05,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:05,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125530297] [2020-12-23 01:08:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:05,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125530297] [2020-12-23 01:08:05,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580605553] [2020-12-23 01:08:05,809 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:05,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:05,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 01:08:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:06,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:08:06,564 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:06,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:06,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:06,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:08:07,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:07,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:07,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:07,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-12-23 01:08:07,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772841170] [2020-12-23 01:08:07,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 01:08:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 01:08:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2062, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 01:08:07,148 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 48 states. [2020-12-23 01:08:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:09,739 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-23 01:08:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 01:08:09,740 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 71 [2020-12-23 01:08:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:09,741 INFO L225 Difference]: With dead ends: 128 [2020-12-23 01:08:09,741 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 01:08:09,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=670, Invalid=5972, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 01:08:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 01:08:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2020-12-23 01:08:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 01:08:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-23 01:08:09,752 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 71 [2020-12-23 01:08:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:09,752 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-23 01:08:09,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 01:08:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-23 01:08:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 01:08:09,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:09,753 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:09,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:09,954 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:09,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1382919375, now seen corresponding path program 21 times [2020-12-23 01:08:09,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:09,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908859372] [2020-12-23 01:08:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:10,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908859372] [2020-12-23 01:08:10,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273678225] [2020-12-23 01:08:10,203 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:10,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 01:08:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:08:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:10,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:10,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-12-23 01:08:10,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070265391] [2020-12-23 01:08:10,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:08:10,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:10,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:08:10,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:08:10,807 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 31 states. [2020-12-23 01:08:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:11,139 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-12-23 01:08:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:08:11,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-12-23 01:08:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:11,141 INFO L225 Difference]: With dead ends: 133 [2020-12-23 01:08:11,141 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 01:08:11,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:08:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 01:08:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-12-23 01:08:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 01:08:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-23 01:08:11,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 75 [2020-12-23 01:08:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:11,155 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-23 01:08:11,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:08:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-23 01:08:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 01:08:11,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:11,156 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:11,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 01:08:11,371 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash -268554572, now seen corresponding path program 22 times [2020-12-23 01:08:11,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:11,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808317732] [2020-12-23 01:08:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:12,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808317732] [2020-12-23 01:08:12,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198774401] [2020-12-23 01:08:12,005 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:12,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:08:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 01:08:12,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:12,764 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:08:12,765 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:12,778 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,779 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:08:12,951 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:12,952 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 41 treesize of output 67 [2020-12-23 01:08:12,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:12,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,990 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:08:12,993 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:12,993 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:08:13,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:13,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:13,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:13,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2020-12-23 01:08:13,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073848120] [2020-12-23 01:08:13,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 01:08:13,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:13,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 01:08:13,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 01:08:13,674 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 52 states. [2020-12-23 01:08:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:16,348 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-12-23 01:08:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 01:08:16,349 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 75 [2020-12-23 01:08:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:16,351 INFO L225 Difference]: With dead ends: 90 [2020-12-23 01:08:16,351 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 01:08:16,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=675, Invalid=5645, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 01:08:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 01:08:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-12-23 01:08:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 01:08:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-12-23 01:08:16,364 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2020-12-23 01:08:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:16,364 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-12-23 01:08:16,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 01:08:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-12-23 01:08:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 01:08:16,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:16,365 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:16,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:16,580 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:16,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:16,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1544093034, now seen corresponding path program 23 times [2020-12-23 01:08:16,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:16,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659376531] [2020-12-23 01:08:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:17,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659376531] [2020-12-23 01:08:17,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949032157] [2020-12-23 01:08:17,180 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:17,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 01:08:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 01:08:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:18,038 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:08:18,038 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:18,048 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:18,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:18,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:08:18,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:18,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:18,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:18,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:18,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2020-12-23 01:08:18,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701930096] [2020-12-23 01:08:18,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 01:08:18,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 01:08:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2346, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 01:08:18,707 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 51 states. [2020-12-23 01:08:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:22,061 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2020-12-23 01:08:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 01:08:22,062 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 79 [2020-12-23 01:08:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:22,063 INFO L225 Difference]: With dead ends: 140 [2020-12-23 01:08:22,063 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 01:08:22,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=710, Invalid=6772, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 01:08:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 01:08:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 89. [2020-12-23 01:08:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 01:08:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-12-23 01:08:22,078 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 79 [2020-12-23 01:08:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:22,079 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-12-23 01:08:22,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 01:08:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-12-23 01:08:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 01:08:22,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:22,080 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:22,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 01:08:22,293 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash 335642912, now seen corresponding path program 24 times [2020-12-23 01:08:22,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:22,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73934578] [2020-12-23 01:08:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73934578] [2020-12-23 01:08:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625920951] [2020-12-23 01:08:22,589 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:23,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 01:08:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:23,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:08:23,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:23,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:23,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2020-12-23 01:08:23,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933921587] [2020-12-23 01:08:23,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 01:08:23,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 01:08:23,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:08:23,532 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 34 states. [2020-12-23 01:08:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:23,925 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2020-12-23 01:08:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:08:23,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 83 [2020-12-23 01:08:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:23,926 INFO L225 Difference]: With dead ends: 145 [2020-12-23 01:08:23,926 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 01:08:23,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:08:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 01:08:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-12-23 01:08:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 01:08:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-23 01:08:23,940 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 83 [2020-12-23 01:08:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:23,941 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-23 01:08:23,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 01:08:23,941 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-23 01:08:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 01:08:23,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:23,942 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:24,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 01:08:24,156 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1044243235, now seen corresponding path program 25 times [2020-12-23 01:08:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:24,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669130129] [2020-12-23 01:08:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:24,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669130129] [2020-12-23 01:08:24,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634039876] [2020-12-23 01:08:24,876 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 01:08:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:25,749 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:08:25,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:25,764 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:25,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:25,766 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:08:25,953 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:25,953 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 41 treesize of output 67 [2020-12-23 01:08:25,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:25,958 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:25,995 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:08:25,997 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:25,997 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:08:26,631 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:26,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:26,633 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:26,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:26,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 55 [2020-12-23 01:08:26,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147476832] [2020-12-23 01:08:26,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 01:08:26,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:26,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 01:08:26,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2719, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:08:26,723 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 55 states. [2020-12-23 01:08:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:29,418 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2020-12-23 01:08:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 01:08:29,419 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 83 [2020-12-23 01:08:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:29,420 INFO L225 Difference]: With dead ends: 98 [2020-12-23 01:08:29,421 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 01:08:29,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=677, Invalid=6129, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 01:08:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 01:08:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2020-12-23 01:08:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 01:08:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-23 01:08:29,442 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2020-12-23 01:08:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-23 01:08:29,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 01:08:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-23 01:08:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 01:08:29,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:29,443 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:29,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 01:08:29,644 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1634394713, now seen corresponding path program 26 times [2020-12-23 01:08:29,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:29,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084462571] [2020-12-23 01:08:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:30,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084462571] [2020-12-23 01:08:30,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743427356] [2020-12-23 01:08:30,427 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:30,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:08:30,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 01:08:30,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:31,493 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:08:31,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:31,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:31,508 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:31,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:08:32,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:32,244 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:32,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:32,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2020-12-23 01:08:32,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636828809] [2020-12-23 01:08:32,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 01:08:32,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 01:08:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2852, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:08:32,332 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 56 states. [2020-12-23 01:08:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:36,127 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-12-23 01:08:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 01:08:36,128 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 87 [2020-12-23 01:08:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:36,129 INFO L225 Difference]: With dead ends: 152 [2020-12-23 01:08:36,130 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 01:08:36,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=792, Invalid=8328, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 01:08:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 01:08:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2020-12-23 01:08:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 01:08:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-23 01:08:36,148 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 87 [2020-12-23 01:08:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:36,149 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-23 01:08:36,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 01:08:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-23 01:08:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 01:08:36,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:36,149 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:36,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:36,363 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash 452548239, now seen corresponding path program 27 times [2020-12-23 01:08:36,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:36,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636388379] [2020-12-23 01:08:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:36,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636388379] [2020-12-23 01:08:36,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476332523] [2020-12-23 01:08:36,712 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:37,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 01:08:37,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:08:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:37,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:37,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2020-12-23 01:08:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210312779] [2020-12-23 01:08:37,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 01:08:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 01:08:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:08:37,610 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 37 states. [2020-12-23 01:08:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:38,025 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2020-12-23 01:08:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:08:38,026 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 91 [2020-12-23 01:08:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:38,027 INFO L225 Difference]: With dead ends: 157 [2020-12-23 01:08:38,027 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 01:08:38,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 01:08:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 01:08:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-12-23 01:08:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 01:08:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-23 01:08:38,041 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 91 [2020-12-23 01:08:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:38,041 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-23 01:08:38,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 01:08:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-23 01:08:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 01:08:38,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:38,042 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:38,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 01:08:38,255 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash 744423186, now seen corresponding path program 28 times [2020-12-23 01:08:38,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:38,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51872171] [2020-12-23 01:08:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:39,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51872171] [2020-12-23 01:08:39,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464503562] [2020-12-23 01:08:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:39,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:08:39,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 01:08:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:40,159 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:08:40,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:40,172 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:40,173 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:40,173 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:08:40,383 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:40,385 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 41 treesize of output 67 [2020-12-23 01:08:40,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:40,392 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:40,431 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:08:40,433 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:40,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:08:41,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:41,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:41,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:41,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2020-12-23 01:08:41,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398470850] [2020-12-23 01:08:41,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 01:08:41,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 01:08:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3262, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 01:08:41,416 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 60 states. [2020-12-23 01:08:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:45,042 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2020-12-23 01:08:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 01:08:45,043 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 91 [2020-12-23 01:08:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:45,045 INFO L225 Difference]: With dead ends: 106 [2020-12-23 01:08:45,045 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 01:08:45,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=781, Invalid=7591, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 01:08:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 01:08:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-12-23 01:08:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 01:08:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-12-23 01:08:45,061 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2020-12-23 01:08:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:45,061 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-12-23 01:08:45,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 01:08:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-12-23 01:08:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 01:08:45,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:45,062 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:45,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:45,263 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash -525439288, now seen corresponding path program 29 times [2020-12-23 01:08:45,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:45,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965312753] [2020-12-23 01:08:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:46,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965312753] [2020-12-23 01:08:46,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644863297] [2020-12-23 01:08:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:46,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:08:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:46,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 01:08:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:47,304 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:08:47,305 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:47,326 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:47,328 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:47,328 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:08:48,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:48,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:48,266 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:48,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:48,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 59 [2020-12-23 01:08:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080717823] [2020-12-23 01:08:48,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 01:08:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 01:08:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3184, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 01:08:48,355 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 59 states. [2020-12-23 01:08:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:53,557 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-12-23 01:08:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 01:08:53,558 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 95 [2020-12-23 01:08:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:53,559 INFO L225 Difference]: With dead ends: 164 [2020-12-23 01:08:53,559 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 01:08:53,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2671 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=832, Invalid=9268, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 01:08:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 01:08:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2020-12-23 01:08:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 01:08:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-12-23 01:08:53,583 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-12-23 01:08:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:53,584 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-12-23 01:08:53,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 01:08:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-12-23 01:08:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 01:08:53,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:53,585 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:53,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 01:08:53,799 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:53,800 INFO L82 PathProgramCache]: Analyzing trace with hash -72150146, now seen corresponding path program 30 times [2020-12-23 01:08:53,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:53,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360230298] [2020-12-23 01:08:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:54,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360230298] [2020-12-23 01:08:54,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473546103] [2020-12-23 01:08:54,265 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:54,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-23 01:08:54,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:08:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 01:08:54,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:55,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:55,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2020-12-23 01:08:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600978505] [2020-12-23 01:08:55,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 01:08:55,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:55,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 01:08:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:08:55,275 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 40 states. [2020-12-23 01:08:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:08:55,830 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-12-23 01:08:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 01:08:55,831 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 99 [2020-12-23 01:08:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:08:55,832 INFO L225 Difference]: With dead ends: 169 [2020-12-23 01:08:55,833 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 01:08:55,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 01:08:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 01:08:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2020-12-23 01:08:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 01:08:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-12-23 01:08:55,851 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 99 [2020-12-23 01:08:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:08:55,851 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-12-23 01:08:55,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 01:08:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-12-23 01:08:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 01:08:55,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:08:55,852 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:08:56,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 01:08:56,053 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:08:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:08:56,054 INFO L82 PathProgramCache]: Analyzing trace with hash 423281281, now seen corresponding path program 31 times [2020-12-23 01:08:56,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:08:56,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85319461] [2020-12-23 01:08:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:08:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:57,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85319461] [2020-12-23 01:08:57,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756017968] [2020-12-23 01:08:57,083 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:08:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:08:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 01:08:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:08:58,314 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:08:58,315 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:58,338 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:58,339 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:58,339 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:08:58,568 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:08:58,569 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 41 treesize of output 67 [2020-12-23 01:08:58,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:58,572 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:08:58,612 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:08:58,614 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:08:58,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:08:59,645 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:59,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:08:59,658 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:08:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:08:59,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:08:59,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 63 [2020-12-23 01:08:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307367052] [2020-12-23 01:08:59,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 01:08:59,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:08:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 01:08:59,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3617, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 01:08:59,772 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 63 states. [2020-12-23 01:09:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:04,289 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-12-23 01:09:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 01:09:04,290 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 99 [2020-12-23 01:09:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:04,291 INFO L225 Difference]: With dead ends: 114 [2020-12-23 01:09:04,291 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 01:09:04,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=783, Invalid=8147, Unknown=0, NotChecked=0, Total=8930 [2020-12-23 01:09:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 01:09:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-12-23 01:09:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 01:09:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-12-23 01:09:04,306 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2020-12-23 01:09:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:04,306 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-12-23 01:09:04,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 01:09:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-12-23 01:09:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 01:09:04,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:04,307 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:04,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 01:09:04,511 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1441996105, now seen corresponding path program 32 times [2020-12-23 01:09:04,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:04,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167909328] [2020-12-23 01:09:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:05,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167909328] [2020-12-23 01:09:05,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535011579] [2020-12-23 01:09:05,837 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:05,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:09:05,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:05,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 01:09:05,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:07,062 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:09:07,063 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:07,075 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:07,077 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:07,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:09:08,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:08,183 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:08,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:08,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2020-12-23 01:09:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003790824] [2020-12-23 01:09:08,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 01:09:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 01:09:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3714, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 01:09:08,290 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 63 states. [2020-12-23 01:09:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:17,317 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2020-12-23 01:09:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 01:09:17,318 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 103 [2020-12-23 01:09:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:17,319 INFO L225 Difference]: With dead ends: 176 [2020-12-23 01:09:17,319 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 01:09:17,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4110 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1090, Invalid=14410, Unknown=0, NotChecked=0, Total=15500 [2020-12-23 01:09:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 01:09:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 113. [2020-12-23 01:09:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 01:09:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-12-23 01:09:17,340 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 103 [2020-12-23 01:09:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:17,341 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-12-23 01:09:17,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 01:09:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-12-23 01:09:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 01:09:17,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:17,341 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:17,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 01:09:17,543 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:17,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1204287469, now seen corresponding path program 33 times [2020-12-23 01:09:17,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:17,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897280770] [2020-12-23 01:09:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:18,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897280770] [2020-12-23 01:09:18,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332251285] [2020-12-23 01:09:18,119 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:18,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 01:09:18,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 01:09:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:19,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:19,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2020-12-23 01:09:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372311479] [2020-12-23 01:09:19,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 01:09:19,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 01:09:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1381, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 01:09:19,276 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 43 states. [2020-12-23 01:09:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:19,968 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2020-12-23 01:09:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 01:09:19,969 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 107 [2020-12-23 01:09:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:19,970 INFO L225 Difference]: With dead ends: 181 [2020-12-23 01:09:19,970 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 01:09:19,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:09:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 01:09:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2020-12-23 01:09:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 01:09:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-12-23 01:09:19,994 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 107 [2020-12-23 01:09:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:19,994 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-12-23 01:09:19,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 01:09:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-12-23 01:09:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 01:09:19,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:19,995 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:20,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 01:09:20,210 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -334860944, now seen corresponding path program 34 times [2020-12-23 01:09:20,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:20,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126403020] [2020-12-23 01:09:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:21,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126403020] [2020-12-23 01:09:21,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91719423] [2020-12-23 01:09:21,766 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:21,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:09:21,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:21,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 01:09:21,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:23,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:09:23,075 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:23,090 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:23,091 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:23,092 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:09:23,340 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:23,344 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 41 treesize of output 67 [2020-12-23 01:09:23,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:23,347 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:23,397 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:09:23,399 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:23,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:09:24,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:24,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:24,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:24,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-12-23 01:09:24,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122457827] [2020-12-23 01:09:24,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 01:09:24,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 01:09:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4322, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:09:24,912 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 68 states. [2020-12-23 01:09:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:34,531 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2020-12-23 01:09:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 01:09:34,537 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 107 [2020-12-23 01:09:34,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:34,538 INFO L225 Difference]: With dead ends: 122 [2020-12-23 01:09:34,538 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 01:09:34,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3515 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=949, Invalid=13093, Unknown=0, NotChecked=0, Total=14042 [2020-12-23 01:09:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 01:09:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-12-23 01:09:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 01:09:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-12-23 01:09:34,563 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2020-12-23 01:09:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:34,563 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-12-23 01:09:34,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 01:09:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-12-23 01:09:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 01:09:34,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:34,564 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:34,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 01:09:34,765 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash -434143706, now seen corresponding path program 35 times [2020-12-23 01:09:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:34,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193616719] [2020-12-23 01:09:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:36,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193616719] [2020-12-23 01:09:36,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835337137] [2020-12-23 01:09:36,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:36,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 01:09:36,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 01:09:36,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:37,941 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:09:37,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:37,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:37,960 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:37,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:09:39,436 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:39,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:39,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:39,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:39,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 67 [2020-12-23 01:09:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801177096] [2020-12-23 01:09:39,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 01:09:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 01:09:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=4150, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 01:09:39,562 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 67 states. [2020-12-23 01:09:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:47,767 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-12-23 01:09:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 01:09:47,768 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 111 [2020-12-23 01:09:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:47,769 INFO L225 Difference]: With dead ends: 188 [2020-12-23 01:09:47,769 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 01:09:47,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=954, Invalid=12156, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 01:09:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 01:09:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 121. [2020-12-23 01:09:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 01:09:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-12-23 01:09:47,789 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 111 [2020-12-23 01:09:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:47,789 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-12-23 01:09:47,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 01:09:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-12-23 01:09:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 01:09:47,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:47,790 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:47,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 01:09:47,991 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:47,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1187953700, now seen corresponding path program 36 times [2020-12-23 01:09:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:47,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280290911] [2020-12-23 01:09:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:48,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280290911] [2020-12-23 01:09:48,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167624002] [2020-12-23 01:09:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:49,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-23 01:09:49,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:09:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 01:09:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:50,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:50,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2020-12-23 01:09:50,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798168831] [2020-12-23 01:09:50,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 01:09:50,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:50,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 01:09:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 01:09:50,033 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 46 states. [2020-12-23 01:09:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:09:50,818 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2020-12-23 01:09:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 01:09:50,819 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 115 [2020-12-23 01:09:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:09:50,820 INFO L225 Difference]: With dead ends: 193 [2020-12-23 01:09:50,820 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 01:09:50,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 01:09:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 01:09:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 116. [2020-12-23 01:09:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 01:09:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2020-12-23 01:09:50,849 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 115 [2020-12-23 01:09:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:09:50,849 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2020-12-23 01:09:50,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 01:09:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2020-12-23 01:09:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 01:09:50,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:09:50,851 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:09:51,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 01:09:51,066 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:09:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:09:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash -462995489, now seen corresponding path program 37 times [2020-12-23 01:09:51,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:09:51,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570773930] [2020-12-23 01:09:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:09:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:52,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570773930] [2020-12-23 01:09:52,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230188749] [2020-12-23 01:09:52,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:09:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:09:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 01:09:52,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:09:54,613 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:09:54,615 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:54,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:54,634 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:54,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:09:54,955 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:09:54,955 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 41 treesize of output 67 [2020-12-23 01:09:54,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:54,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:09:55,023 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:09:55,026 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:09:55,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:09:56,658 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:56,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:09:56,661 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:09:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:09:56,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:09:56,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2020-12-23 01:09:56,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225252609] [2020-12-23 01:09:56,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 01:09:56,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:09:56,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 01:09:56,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=4643, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 01:09:56,804 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 71 states. [2020-12-23 01:10:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:03,997 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2020-12-23 01:10:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 01:10:03,999 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 115 [2020-12-23 01:10:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:04,000 INFO L225 Difference]: With dead ends: 130 [2020-12-23 01:10:04,000 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 01:10:04,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=889, Invalid=10453, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 01:10:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 01:10:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-12-23 01:10:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 01:10:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-12-23 01:10:04,029 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 115 [2020-12-23 01:10:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:04,029 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-12-23 01:10:04,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 01:10:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-12-23 01:10:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 01:10:04,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:04,030 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:04,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:04,245 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash -438337259, now seen corresponding path program 38 times [2020-12-23 01:10:04,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:04,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119920013] [2020-12-23 01:10:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:05,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119920013] [2020-12-23 01:10:05,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264320891] [2020-12-23 01:10:05,996 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:06,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:10:06,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 01:10:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:08,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:10:08,054 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:08,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:08,074 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:08,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:10:09,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:09,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:10:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:09,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:09,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2020-12-23 01:10:09,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482481020] [2020-12-23 01:10:09,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 01:10:09,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:09,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 01:10:09,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=4816, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 01:10:09,960 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 72 states. [2020-12-23 01:10:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:17,928 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2020-12-23 01:10:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 01:10:17,929 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 119 [2020-12-23 01:10:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:17,931 INFO L225 Difference]: With dead ends: 200 [2020-12-23 01:10:17,931 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 01:10:17,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1036, Invalid=14216, Unknown=0, NotChecked=0, Total=15252 [2020-12-23 01:10:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 01:10:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 129. [2020-12-23 01:10:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 01:10:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-12-23 01:10:17,958 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 119 [2020-12-23 01:10:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:17,958 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-12-23 01:10:17,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 01:10:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-12-23 01:10:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 01:10:17,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:17,959 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:18,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:18,160 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:18,160 INFO L82 PathProgramCache]: Analyzing trace with hash 38287179, now seen corresponding path program 39 times [2020-12-23 01:10:18,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:18,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738478601] [2020-12-23 01:10:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:18,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738478601] [2020-12-23 01:10:18,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187417692] [2020-12-23 01:10:18,762 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:19,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 01:10:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:19,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 01:10:19,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:20,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:20,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2020-12-23 01:10:20,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800688232] [2020-12-23 01:10:20,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 01:10:20,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 01:10:20,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:10:20,346 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 49 states. [2020-12-23 01:10:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:21,313 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2020-12-23 01:10:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 01:10:21,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 123 [2020-12-23 01:10:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:21,317 INFO L225 Difference]: With dead ends: 205 [2020-12-23 01:10:21,317 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 01:10:21,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 01:10:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 01:10:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 124. [2020-12-23 01:10:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 01:10:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-12-23 01:10:21,348 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 123 [2020-12-23 01:10:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:21,348 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-12-23 01:10:21,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 01:10:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-12-23 01:10:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 01:10:21,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:21,349 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:21,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 01:10:21,562 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1783265742, now seen corresponding path program 40 times [2020-12-23 01:10:21,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:21,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663544516] [2020-12-23 01:10:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 0 proven. 773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663544516] [2020-12-23 01:10:23,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24455074] [2020-12-23 01:10:23,247 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:23,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:10:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 01:10:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:25,442 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:10:25,444 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:25,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:25,463 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:25,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:10:25,797 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:25,798 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 41 treesize of output 67 [2020-12-23 01:10:25,800 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:10:25,802 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:25,857 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:10:25,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:25,860 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:10:27,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:27,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:10:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 0 proven. 773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:27,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:27,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2020-12-23 01:10:27,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207540322] [2020-12-23 01:10:27,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 01:10:27,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:27,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 01:10:27,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5346, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 01:10:27,989 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 76 states. [2020-12-23 01:10:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:34,504 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2020-12-23 01:10:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 01:10:34,506 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 123 [2020-12-23 01:10:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:34,506 INFO L225 Difference]: With dead ends: 138 [2020-12-23 01:10:34,507 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 01:10:34,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=993, Invalid=12347, Unknown=0, NotChecked=0, Total=13340 [2020-12-23 01:10:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 01:10:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-12-23 01:10:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 01:10:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2020-12-23 01:10:34,537 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 123 [2020-12-23 01:10:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:34,538 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2020-12-23 01:10:34,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 01:10:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2020-12-23 01:10:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 01:10:34,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:34,539 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:34,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:34,754 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash -223990908, now seen corresponding path program 41 times [2020-12-23 01:10:34,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:34,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634641403] [2020-12-23 01:10:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634641403] [2020-12-23 01:10:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523143751] [2020-12-23 01:10:36,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:36,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 01:10:36,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 01:10:36,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:38,630 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:10:38,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:10:38,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:10:38,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:10:38,647 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:10:40,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:40,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:10:40,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:10:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:40,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:40,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 75 [2020-12-23 01:10:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392066795] [2020-12-23 01:10:40,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 01:10:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 01:10:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=5244, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 01:10:40,720 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 75 states. [2020-12-23 01:10:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:51,524 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-12-23 01:10:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 01:10:51,525 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 127 [2020-12-23 01:10:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:51,526 INFO L225 Difference]: With dead ends: 212 [2020-12-23 01:10:51,526 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 01:10:51,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4477 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1076, Invalid=15436, Unknown=0, NotChecked=0, Total=16512 [2020-12-23 01:10:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 01:10:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 137. [2020-12-23 01:10:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 01:10:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-12-23 01:10:51,555 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 127 [2020-12-23 01:10:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:51,555 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-12-23 01:10:51,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 01:10:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-12-23 01:10:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 01:10:51,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:51,556 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:51,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:51,757 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:51,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1647963590, now seen corresponding path program 42 times [2020-12-23 01:10:51,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:51,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773492464] [2020-12-23 01:10:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:52,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773492464] [2020-12-23 01:10:52,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096795606] [2020-12-23 01:10:52,772 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:53,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 01:10:53,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:10:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 01:10:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:10:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:54,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:10:54,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2020-12-23 01:10:54,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828367195] [2020-12-23 01:10:54,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 01:10:54,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:10:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 01:10:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=2035, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 01:10:54,732 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 52 states. [2020-12-23 01:10:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:10:55,857 INFO L93 Difference]: Finished difference Result 217 states and 219 transitions. [2020-12-23 01:10:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 01:10:55,859 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 131 [2020-12-23 01:10:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:10:55,860 INFO L225 Difference]: With dead ends: 217 [2020-12-23 01:10:55,860 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 01:10:55,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:10:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 01:10:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 132. [2020-12-23 01:10:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 01:10:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-12-23 01:10:55,882 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 131 [2020-12-23 01:10:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:10:55,882 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-12-23 01:10:55,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 01:10:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-12-23 01:10:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 01:10:55,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:10:55,883 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:10:56,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 01:10:56,097 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:10:56,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:10:56,098 INFO L82 PathProgramCache]: Analyzing trace with hash -569550019, now seen corresponding path program 43 times [2020-12-23 01:10:56,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:10:56,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028361822] [2020-12-23 01:10:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:10:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:10:57,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028361822] [2020-12-23 01:10:57,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488487959] [2020-12-23 01:10:57,969 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:10:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:10:58,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 01:10:58,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:00,331 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-23 01:11:00,333 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:00,352 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:00,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:00,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:37 [2020-12-23 01:11:00,689 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:00,690 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 41 treesize of output 67 [2020-12-23 01:11:00,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:11:00,695 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:00,751 INFO L625 ElimStorePlain]: treesize reduction 26, result has 63.9 percent of original size [2020-12-23 01:11:00,754 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:00,754 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:19 [2020-12-23 01:11:02,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:02,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:02,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:11:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:02,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:02,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 79 [2020-12-23 01:11:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026285016] [2020-12-23 01:11:02,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 01:11:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 01:11:02,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=5797, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 01:11:02,976 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 79 states. [2020-12-23 01:11:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:11:11,780 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2020-12-23 01:11:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 01:11:11,782 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 131 [2020-12-23 01:11:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:11:11,783 INFO L225 Difference]: With dead ends: 146 [2020-12-23 01:11:11,783 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 01:11:11,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=995, Invalid=13047, Unknown=0, NotChecked=0, Total=14042 [2020-12-23 01:11:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 01:11:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2020-12-23 01:11:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 01:11:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2020-12-23 01:11:11,805 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2020-12-23 01:11:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:11:11,805 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2020-12-23 01:11:11,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 01:11:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2020-12-23 01:11:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 01:11:11,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:11:11,806 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:11:12,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 01:11:12,007 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:11:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:11:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash 506248563, now seen corresponding path program 44 times [2020-12-23 01:11:12,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:11:12,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445022344] [2020-12-23 01:11:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:11:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:11:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:14,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445022344] [2020-12-23 01:11:14,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685483713] [2020-12-23 01:11:14,053 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:11:14,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:11:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:11:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 01:11:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:11:16,874 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 01:11:16,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:11:16,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:11:16,898 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:11:16,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:19 [2020-12-23 01:11:19,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:11:19,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:11:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:11:19,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:11:19,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2020-12-23 01:11:19,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684173077] [2020-12-23 01:11:19,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 01:11:19,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:11:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 01:11:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=5990, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 01:11:19,459 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 80 states.