/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:41:07,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:41:07,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:41:07,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:41:07,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:41:07,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:41:07,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:41:07,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:41:07,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:41:07,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:41:07,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:41:07,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:41:07,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:41:07,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:41:07,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:41:07,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:41:07,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:41:07,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:41:07,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:41:07,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:41:07,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:41:07,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:41:07,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:41:07,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:41:07,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:41:07,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:41:07,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:41:07,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:41:07,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:41:07,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:41:07,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:41:07,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:41:07,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:41:07,949 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:41:07,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:41:07,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:41:07,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:41:07,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:41:07,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:41:07,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:41:07,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:41:07,952 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:41:07,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:41:07,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:41:07,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:41:07,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:41:07,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:07,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:41:07,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:41:07,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:41:07,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:41:07,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:41:07,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:41:07,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:41:07,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:41:08,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:41:08,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:41:08,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:41:08,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:41:08,390 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:41:08,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-2.i [2021-01-06 16:41:08,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1958c34a3/eeeaee2495d84b4bb682541872a0cf0d/FLAGa9649a993 [2021-01-06 16:41:09,206 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:41:09,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i [2021-01-06 16:41:09,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1958c34a3/eeeaee2495d84b4bb682541872a0cf0d/FLAGa9649a993 [2021-01-06 16:41:09,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1958c34a3/eeeaee2495d84b4bb682541872a0cf0d [2021-01-06 16:41:09,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:41:09,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:41:09,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:09,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:41:09,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:41:09,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2c3d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09, skipping insertion in model container [2021-01-06 16:41:09,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:41:09,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:41:09,736 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~string_entrada~0,],[BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~string_entrada~0,],[IntegerLiteral[9]]] left hand side expression in assignment: lhs: VariableLHS[~n_caracter~0,] left hand side expression in assignment: lhs: VariableLHS[~cont~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 16:41:09,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:09,779 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:41:09,793 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#string_entrada~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#string_entrada~0,],offset],BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#string_entrada~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[9],StructAccessExpression[IdentifierExpression[~#string_entrada~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~n_caracter~0,] left hand side expression in assignment: lhs: VariableLHS[~cont~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 16:41:09,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:09,824 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:41:09,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09 WrapperNode [2021-01-06 16:41:09,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:09,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:09,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:41:09,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:41:09,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:09,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:41:09,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:41:09,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:41:09,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:41:09,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:41:09,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:41:09,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:41:09,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:41:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:41:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:41:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:41:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:41:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:41:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:41:10,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:41:10,389 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 16:41:10,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:10 BoogieIcfgContainer [2021-01-06 16:41:10,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:41:10,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:41:10,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:41:10,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:41:10,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:41:09" (1/3) ... [2021-01-06 16:41:10,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e09d2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:10, skipping insertion in model container [2021-01-06 16:41:10,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (2/3) ... [2021-01-06 16:41:10,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e09d2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:10, skipping insertion in model container [2021-01-06 16:41:10,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:10" (3/3) ... [2021-01-06 16:41:10,402 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2021-01-06 16:41:10,410 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:41:10,418 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:41:10,448 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:41:10,484 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:41:10,485 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:41:10,485 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:41:10,485 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:41:10,485 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:41:10,485 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:41:10,486 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:41:10,486 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:41:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2021-01-06 16:41:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:41:10,515 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:10,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:10,517 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash -814739894, now seen corresponding path program 1 times [2021-01-06 16:41:10,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:10,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25586414] [2021-01-06 16:41:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:10,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25586414] [2021-01-06 16:41:10,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:10,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:41:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186324968] [2021-01-06 16:41:10,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:41:10,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:10,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:41:10,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:10,917 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2021-01-06 16:41:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:10,937 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2021-01-06 16:41:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:41:10,939 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 16:41:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:10,948 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:41:10,949 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:41:10,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:41:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 16:41:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:41:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-01-06 16:41:11,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2021-01-06 16:41:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,002 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-01-06 16:41:11,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:41:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-01-06 16:41:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:41:11,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:11,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:41:11,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1144484620, now seen corresponding path program 1 times [2021-01-06 16:41:11,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235982553] [2021-01-06 16:41:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235982553] [2021-01-06 16:41:11,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:11,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:41:11,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533443633] [2021-01-06 16:41:11,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:41:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:11,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:41:11,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:11,122 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 3 states. [2021-01-06 16:41:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:11,176 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-01-06 16:41:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:41:11,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 16:41:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:11,178 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:41:11,178 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:41:11,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:41:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2021-01-06 16:41:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:41:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-01-06 16:41:11,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2021-01-06 16:41:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,187 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-01-06 16:41:11,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:41:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-01-06 16:41:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:41:11,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:11,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:41:11,189 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1978272138, now seen corresponding path program 1 times [2021-01-06 16:41:11,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180654892] [2021-01-06 16:41:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:11,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180654892] [2021-01-06 16:41:11,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460166611] [2021-01-06 16:41:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:41:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:11,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:11,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:41:11,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973452857] [2021-01-06 16:41:11,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:11,504 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 5 states. [2021-01-06 16:41:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:11,649 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2021-01-06 16:41:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:11,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 16:41:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:11,661 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:41:11,662 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:41:11,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:41:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 27. [2021-01-06 16:41:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:41:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-01-06 16:41:11,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 16 [2021-01-06 16:41:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,680 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-01-06 16:41:11,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-01-06 16:41:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:41:11,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:11,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:41:11,899 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash -89192584, now seen corresponding path program 2 times [2021-01-06 16:41:11,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445187466] [2021-01-06 16:41:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445187466] [2021-01-06 16:41:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471531039] [2021-01-06 16:41:11,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:12,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 16:41:12,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:12,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:12,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:12,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:41:12,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 16:41:12,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82570298] [2021-01-06 16:41:12,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:41:12,138 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2021-01-06 16:41:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:12,180 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-01-06 16:41:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:41:12,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2021-01-06 16:41:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:12,184 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:41:12,184 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 16:41:12,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 16:41:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2021-01-06 16:41:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:41:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-01-06 16:41:12,203 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2021-01-06 16:41:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:12,204 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-01-06 16:41:12,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-01-06 16:41:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:41:12,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:12,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:12,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:12,421 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:12,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1955255585, now seen corresponding path program 1 times [2021-01-06 16:41:12,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:12,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744076951] [2021-01-06 16:41:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:41:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744076951] [2021-01-06 16:41:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648791244] [2021-01-06 16:41:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:41:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:41:12,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:12,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:41:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493695314] [2021-01-06 16:41:12,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:41:12,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:41:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:12,750 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 6 states. [2021-01-06 16:41:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:12,889 INFO L93 Difference]: Finished difference Result 156 states and 209 transitions. [2021-01-06 16:41:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:41:12,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-01-06 16:41:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:12,892 INFO L225 Difference]: With dead ends: 156 [2021-01-06 16:41:12,893 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 16:41:12,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 16:41:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 41. [2021-01-06 16:41:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:41:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-01-06 16:41:12,902 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-01-06 16:41:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:12,902 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-01-06 16:41:12,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:41:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-01-06 16:41:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:41:12,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:12,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:13,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:13,118 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash 116791777, now seen corresponding path program 2 times [2021-01-06 16:41:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:13,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906730880] [2021-01-06 16:41:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:41:13,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906730880] [2021-01-06 16:41:13,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407819707] [2021-01-06 16:41:13,209 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 [2021-01-06 16:41:13,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:41:13,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:41:13,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:13,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 16:41:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547849084] [2021-01-06 16:41:13,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:41:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:41:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:41:13,331 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 8 states. [2021-01-06 16:41:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:13,605 INFO L93 Difference]: Finished difference Result 265 states and 350 transitions. [2021-01-06 16:41:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:41:13,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 16:41:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:13,608 INFO L225 Difference]: With dead ends: 265 [2021-01-06 16:41:13,608 INFO L226 Difference]: Without dead ends: 233 [2021-01-06 16:41:13,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-01-06 16:41:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 47. [2021-01-06 16:41:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:41:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-01-06 16:41:13,619 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 26 [2021-01-06 16:41:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:13,619 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-01-06 16:41:13,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:41:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-01-06 16:41:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:41:13,620 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:13,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:13,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:13,835 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash -342131421, now seen corresponding path program 1 times [2021-01-06 16:41:13,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:13,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790460684] [2021-01-06 16:41:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:41:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790460684] [2021-01-06 16:41:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069756344] [2021-01-06 16:41:14,014 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:14,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:41:14,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:14,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-01-06 16:41:14,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587473172] [2021-01-06 16:41:14,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:41:14,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:14,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:41:14,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:14,159 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 9 states. [2021-01-06 16:41:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:14,709 INFO L93 Difference]: Finished difference Result 366 states and 535 transitions. [2021-01-06 16:41:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:41:14,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 16:41:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:14,712 INFO L225 Difference]: With dead ends: 366 [2021-01-06 16:41:14,712 INFO L226 Difference]: Without dead ends: 330 [2021-01-06 16:41:14,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:41:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-01-06 16:41:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 65. [2021-01-06 16:41:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:41:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-01-06 16:41:14,726 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 29 [2021-01-06 16:41:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:14,726 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-01-06 16:41:14,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:41:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-01-06 16:41:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:41:14,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:14,728 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:14,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:41:14,939 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash -306811540, now seen corresponding path program 2 times [2021-01-06 16:41:14,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:14,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841881625] [2021-01-06 16:41:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:41:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841881625] [2021-01-06 16:41:15,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927817945] [2021-01-06 16:41:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:15,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:15,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:15,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:41:15,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:41:15,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:15,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-01-06 16:41:15,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50038674] [2021-01-06 16:41:15,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:41:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:41:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:15,256 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 11 states. [2021-01-06 16:41:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:16,265 INFO L93 Difference]: Finished difference Result 520 states and 720 transitions. [2021-01-06 16:41:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:41:16,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2021-01-06 16:41:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:16,275 INFO L225 Difference]: With dead ends: 520 [2021-01-06 16:41:16,275 INFO L226 Difference]: Without dead ends: 468 [2021-01-06 16:41:16,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:41:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-01-06 16:41:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 79. [2021-01-06 16:41:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:41:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2021-01-06 16:41:16,294 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 34 [2021-01-06 16:41:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:16,294 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2021-01-06 16:41:16,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:41:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2021-01-06 16:41:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:41:16,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:16,296 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:16,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:16,510 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash -362617921, now seen corresponding path program 3 times [2021-01-06 16:41:16,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:16,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13125354] [2021-01-06 16:41:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 16:41:16,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13125354] [2021-01-06 16:41:16,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616174013] [2021-01-06 16:41:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:16,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:41:16,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:41:16,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:16,846 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:41:16,847 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:16,854 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:16,856 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:16,857 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2021-01-06 16:41:17,054 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:17,054 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-01-06 16:41:17,056 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:17,058 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:17,059 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:17,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:3 [2021-01-06 16:41:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 16:41:17,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:41:17,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-01-06 16:41:17,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590750711] [2021-01-06 16:41:17,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:41:17,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:17,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:41:17,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:41:17,100 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 10 states. [2021-01-06 16:41:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:17,189 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2021-01-06 16:41:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:41:17,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2021-01-06 16:41:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:17,193 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:41:17,193 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 16:41:17,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:41:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 16:41:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-01-06 16:41:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:41:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2021-01-06 16:41:17,213 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 39 [2021-01-06 16:41:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:17,214 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2021-01-06 16:41:17,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:41:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2021-01-06 16:41:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:41:17,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:17,215 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:17,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:17,430 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1769349196, now seen corresponding path program 1 times [2021-01-06 16:41:17,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:17,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776469205] [2021-01-06 16:41:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776469205] [2021-01-06 16:41:17,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866647092] [2021-01-06 16:41:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:41:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:17,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:17,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:41:17,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380135862] [2021-01-06 16:41:17,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:41:17,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:41:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:17,760 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 10 states. [2021-01-06 16:41:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:18,192 INFO L93 Difference]: Finished difference Result 530 states and 694 transitions. [2021-01-06 16:41:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:41:18,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2021-01-06 16:41:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:18,196 INFO L225 Difference]: With dead ends: 530 [2021-01-06 16:41:18,196 INFO L226 Difference]: Without dead ends: 468 [2021-01-06 16:41:18,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-01-06 16:41:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 79. [2021-01-06 16:41:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:41:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-01-06 16:41:18,213 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 40 [2021-01-06 16:41:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:18,213 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-01-06 16:41:18,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:41:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-01-06 16:41:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:41:18,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:18,215 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:18,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:41:18,428 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash 478989134, now seen corresponding path program 2 times [2021-01-06 16:41:18,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:18,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379147326] [2021-01-06 16:41:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379147326] [2021-01-06 16:41:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634493894] [2021-01-06 16:41:18,581 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:18,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:18,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:41:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:18,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:18,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:41:18,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677595702] [2021-01-06 16:41:18,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:41:18,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:18,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:41:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:18,792 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 11 states. [2021-01-06 16:41:19,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:19,371 INFO L93 Difference]: Finished difference Result 588 states and 770 transitions. [2021-01-06 16:41:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:41:19,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2021-01-06 16:41:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:19,375 INFO L225 Difference]: With dead ends: 588 [2021-01-06 16:41:19,375 INFO L226 Difference]: Without dead ends: 526 [2021-01-06 16:41:19,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-01-06 16:41:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 81. [2021-01-06 16:41:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:41:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2021-01-06 16:41:19,392 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 42 [2021-01-06 16:41:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:19,393 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2021-01-06 16:41:19,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:41:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2021-01-06 16:41:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:41:19,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:19,394 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:19,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:19,608 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1688518096, now seen corresponding path program 3 times [2021-01-06 16:41:19,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:19,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339744412] [2021-01-06 16:41:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:41:19,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339744412] [2021-01-06 16:41:19,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067288744] [2021-01-06 16:41:19,859 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:19,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:41:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:41:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:20,154 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-01-06 16:41:20,155 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:20,158 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:20,158 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:20,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2021-01-06 16:41:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 16:41:20,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:20,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-01-06 16:41:20,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917070742] [2021-01-06 16:41:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:41:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:20,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:41:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:41:20,185 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 17 states. [2021-01-06 16:41:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:21,352 INFO L93 Difference]: Finished difference Result 642 states and 843 transitions. [2021-01-06 16:41:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:41:21,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2021-01-06 16:41:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:21,356 INFO L225 Difference]: With dead ends: 642 [2021-01-06 16:41:21,356 INFO L226 Difference]: Without dead ends: 580 [2021-01-06 16:41:21,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:41:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-01-06 16:41:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 85. [2021-01-06 16:41:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:41:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-01-06 16:41:21,373 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 44 [2021-01-06 16:41:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:21,373 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-01-06 16:41:21,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:41:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-01-06 16:41:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:41:21,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:21,374 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:21,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:21,585 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash 417034868, now seen corresponding path program 1 times [2021-01-06 16:41:21,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:21,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100141944] [2021-01-06 16:41:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:41:21,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100141944] [2021-01-06 16:41:21,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597354753] [2021-01-06 16:41:21,817 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:41:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:41:22,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:22,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:41:22,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781239810] [2021-01-06 16:41:22,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:41:22,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:41:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:22,040 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand 13 states. [2021-01-06 16:41:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:22,887 INFO L93 Difference]: Finished difference Result 702 states and 920 transitions. [2021-01-06 16:41:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:41:22,888 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2021-01-06 16:41:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:22,892 INFO L225 Difference]: With dead ends: 702 [2021-01-06 16:41:22,892 INFO L226 Difference]: Without dead ends: 638 [2021-01-06 16:41:22,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-01-06 16:41:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 87. [2021-01-06 16:41:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:41:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2021-01-06 16:41:22,909 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 47 [2021-01-06 16:41:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:22,909 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-01-06 16:41:22,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:41:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2021-01-06 16:41:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 16:41:22,910 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:22,910 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:23,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:41:23,119 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:23,120 INFO L82 PathProgramCache]: Analyzing trace with hash 432062770, now seen corresponding path program 2 times [2021-01-06 16:41:23,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:23,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743332717] [2021-01-06 16:41:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-01-06 16:41:23,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743332717] [2021-01-06 16:41:23,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210710133] [2021-01-06 16:41:23,211 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:23,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:23,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:23,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-01-06 16:41:23,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:23,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:41:23,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205895917] [2021-01-06 16:41:23,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:23,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:23,373 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 7 states. [2021-01-06 16:41:23,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:23,477 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2021-01-06 16:41:23,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:41:23,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2021-01-06 16:41:23,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:23,479 INFO L225 Difference]: With dead ends: 165 [2021-01-06 16:41:23,479 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 16:41:23,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 16:41:23,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2021-01-06 16:41:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:41:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-01-06 16:41:23,496 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 49 [2021-01-06 16:41:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:23,496 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-01-06 16:41:23,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-01-06 16:41:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:41:23,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:23,497 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:23,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:41:23,705 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:23,705 INFO L82 PathProgramCache]: Analyzing trace with hash -390681093, now seen corresponding path program 3 times [2021-01-06 16:41:23,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:23,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161572972] [2021-01-06 16:41:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-01-06 16:41:23,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161572972] [2021-01-06 16:41:23,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911138793] [2021-01-06 16:41:23,816 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:23,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:41:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:23,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:41:23,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 16:41:24,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:24,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 16:41:24,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533212628] [2021-01-06 16:41:24,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:41:24,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:41:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:24,033 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand 10 states. [2021-01-06 16:41:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:24,446 INFO L93 Difference]: Finished difference Result 359 states and 484 transitions. [2021-01-06 16:41:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:41:24,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2021-01-06 16:41:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:24,448 INFO L225 Difference]: With dead ends: 359 [2021-01-06 16:41:24,448 INFO L226 Difference]: Without dead ends: 289 [2021-01-06 16:41:24,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:41:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-01-06 16:41:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 115. [2021-01-06 16:41:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 16:41:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2021-01-06 16:41:24,469 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 52 [2021-01-06 16:41:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:24,469 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2021-01-06 16:41:24,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:41:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2021-01-06 16:41:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 16:41:24,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:24,470 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:24,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:41:24,685 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 845868301, now seen corresponding path program 4 times [2021-01-06 16:41:24,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:24,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078667839] [2021-01-06 16:41:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-01-06 16:41:24,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078667839] [2021-01-06 16:41:24,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756576147] [2021-01-06 16:41:24,797 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:24,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:24,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:41:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:25,100 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-01-06 16:41:25,102 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:25,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:25,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:25,106 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2021-01-06 16:41:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-01-06 16:41:25,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:25,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-01-06 16:41:25,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608099925] [2021-01-06 16:41:25,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:41:25,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:25,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:41:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:41:25,140 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand 16 states. [2021-01-06 16:41:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:26,485 INFO L93 Difference]: Finished difference Result 505 states and 685 transitions. [2021-01-06 16:41:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:41:26,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2021-01-06 16:41:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:26,488 INFO L225 Difference]: With dead ends: 505 [2021-01-06 16:41:26,488 INFO L226 Difference]: Without dead ends: 423 [2021-01-06 16:41:26,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:41:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-01-06 16:41:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 214. [2021-01-06 16:41:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2021-01-06 16:41:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 277 transitions. [2021-01-06 16:41:26,526 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 277 transitions. Word has length 57 [2021-01-06 16:41:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 277 transitions. [2021-01-06 16:41:26,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:41:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 277 transitions. [2021-01-06 16:41:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 16:41:26,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:26,528 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:26,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:26,739 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2013020394, now seen corresponding path program 1 times [2021-01-06 16:41:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:26,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484956502] [2021-01-06 16:41:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 16:41:26,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484956502] [2021-01-06 16:41:26,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006865823] [2021-01-06 16:41:26,879 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:41:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 16:41:27,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:27,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:41:27,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342220843] [2021-01-06 16:41:27,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:41:27,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:41:27,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:27,089 INFO L87 Difference]: Start difference. First operand 214 states and 277 transitions. Second operand 10 states. [2021-01-06 16:41:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:27,352 INFO L93 Difference]: Finished difference Result 435 states and 582 transitions. [2021-01-06 16:41:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:41:27,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2021-01-06 16:41:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:27,354 INFO L225 Difference]: With dead ends: 435 [2021-01-06 16:41:27,354 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 16:41:27,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:27,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 16:41:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2021-01-06 16:41:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2021-01-06 16:41:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 309 transitions. [2021-01-06 16:41:27,407 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 309 transitions. Word has length 79 [2021-01-06 16:41:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:27,407 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 309 transitions. [2021-01-06 16:41:27,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:41:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 309 transitions. [2021-01-06 16:41:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 16:41:27,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:27,408 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:27,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:41:27,623 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:27,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1346089899, now seen corresponding path program 2 times [2021-01-06 16:41:27,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:27,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619027609] [2021-01-06 16:41:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-01-06 16:41:27,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619027609] [2021-01-06 16:41:27,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553190505] [2021-01-06 16:41:27,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:27,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:27,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:41:27,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-01-06 16:41:28,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:28,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:41:28,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876027860] [2021-01-06 16:41:28,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:41:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:41:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:28,047 INFO L87 Difference]: Start difference. First operand 238 states and 309 transitions. Second operand 11 states. [2021-01-06 16:41:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:28,343 INFO L93 Difference]: Finished difference Result 483 states and 646 transitions. [2021-01-06 16:41:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:41:28,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2021-01-06 16:41:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:28,345 INFO L225 Difference]: With dead ends: 483 [2021-01-06 16:41:28,345 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 16:41:28,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 16:41:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 262. [2021-01-06 16:41:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-01-06 16:41:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 341 transitions. [2021-01-06 16:41:28,402 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 341 transitions. Word has length 85 [2021-01-06 16:41:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:28,402 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 341 transitions. [2021-01-06 16:41:28,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:41:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 341 transitions. [2021-01-06 16:41:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 16:41:28,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:28,404 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:28,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:41:28,618 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash 20519926, now seen corresponding path program 3 times [2021-01-06 16:41:28,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:28,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323779076] [2021-01-06 16:41:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-01-06 16:41:28,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323779076] [2021-01-06 16:41:28,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307893864] [2021-01-06 16:41:28,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:29,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:41:29,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:41:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-01-06 16:41:30,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:30,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:41:30,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608580011] [2021-01-06 16:41:30,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:41:30,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:30,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:41:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:41:30,056 INFO L87 Difference]: Start difference. First operand 262 states and 341 transitions. Second operand 12 states. [2021-01-06 16:41:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:30,362 INFO L93 Difference]: Finished difference Result 519 states and 687 transitions. [2021-01-06 16:41:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:41:30,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2021-01-06 16:41:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:30,365 INFO L225 Difference]: With dead ends: 519 [2021-01-06 16:41:30,365 INFO L226 Difference]: Without dead ends: 290 [2021-01-06 16:41:30,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:41:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-01-06 16:41:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 274. [2021-01-06 16:41:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2021-01-06 16:41:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 353 transitions. [2021-01-06 16:41:30,425 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 353 transitions. Word has length 91 [2021-01-06 16:41:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:30,426 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 353 transitions. [2021-01-06 16:41:30,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:41:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 353 transitions. [2021-01-06 16:41:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:41:30,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:30,427 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:30,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:30,636 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1468083383, now seen corresponding path program 4 times [2021-01-06 16:41:30,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:30,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969294274] [2021-01-06 16:41:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-01-06 16:41:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969294274] [2021-01-06 16:41:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142489881] [2021-01-06 16:41:30,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:30,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:30,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:30,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:41:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-01-06 16:41:31,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:31,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:41:31,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893788361] [2021-01-06 16:41:31,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:41:31,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:31,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:41:31,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:31,074 INFO L87 Difference]: Start difference. First operand 274 states and 353 transitions. Second operand 13 states. [2021-01-06 16:41:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:31,426 INFO L93 Difference]: Finished difference Result 371 states and 483 transitions. [2021-01-06 16:41:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:41:31,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2021-01-06 16:41:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:31,428 INFO L225 Difference]: With dead ends: 371 [2021-01-06 16:41:31,428 INFO L226 Difference]: Without dead ends: 302 [2021-01-06 16:41:31,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-01-06 16:41:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2021-01-06 16:41:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2021-01-06 16:41:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 369 transitions. [2021-01-06 16:41:31,472 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 369 transitions. Word has length 94 [2021-01-06 16:41:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:31,472 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 369 transitions. [2021-01-06 16:41:31,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:41:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 369 transitions. [2021-01-06 16:41:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:41:31,473 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:31,473 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:31,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:31,674 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 64411734, now seen corresponding path program 5 times [2021-01-06 16:41:31,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:31,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257647751] [2021-01-06 16:41:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-01-06 16:41:32,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257647751] [2021-01-06 16:41:32,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696616557] [2021-01-06 16:41:32,297 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 [2021-01-06 16:41:34,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:41:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:34,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 105 conjunts are in the unsatisfiable core [2021-01-06 16:41:34,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:34,216 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 16:41:34,219 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,231 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-01-06 16:41:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,283 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:32 [2021-01-06 16:41:34,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,361 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,399 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2021-01-06 16:41:34,402 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-01-06 16:41:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,458 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,460 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,494 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2021-01-06 16:41:34,496 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-01-06 16:41:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,551 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,584 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2021-01-06 16:41:34,586 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-01-06 16:41:34,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,644 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,646 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,686 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2021-01-06 16:41:34,688 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,689 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-01-06 16:41:34,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,748 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-01-06 16:41:34,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,764 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:29 [2021-01-06 16:41:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,819 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,822 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,838 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,840 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,840 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2021-01-06 16:41:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,855 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,874 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2021-01-06 16:41:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,888 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,902 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2021-01-06 16:41:34,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,917 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-01-06 16:41:34,919 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,934 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,936 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,936 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2021-01-06 16:41:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:34,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-01-06 16:41:34,954 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,966 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:34,967 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:34,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2021-01-06 16:41:37,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:41:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:41:37,468 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 19 [2021-01-06 16:41:37,470 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:37,486 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2021-01-06 16:41:37,487 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:37,488 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-01-06 16:41:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 180 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 16:41:37,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:37,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29] total 41 [2021-01-06 16:41:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166542132] [2021-01-06 16:41:37,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:41:37,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:41:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:41:37,664 INFO L87 Difference]: Start difference. First operand 286 states and 369 transitions. Second operand 41 states. [2021-01-06 16:41:42,169 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-01-06 16:41:46,138 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-01-06 16:42:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:05,167 INFO L93 Difference]: Finished difference Result 2402 states and 3137 transitions. [2021-01-06 16:42:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-01-06 16:42:05,167 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 97 [2021-01-06 16:42:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:05,178 INFO L225 Difference]: With dead ends: 2402 [2021-01-06 16:42:05,178 INFO L226 Difference]: Without dead ends: 2272 [2021-01-06 16:42:05,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22338 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=3197, Invalid=53685, Unknown=0, NotChecked=0, Total=56882 [2021-01-06 16:42:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-01-06 16:42:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 391. [2021-01-06 16:42:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2021-01-06 16:42:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 503 transitions. [2021-01-06 16:42:05,298 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 503 transitions. Word has length 97 [2021-01-06 16:42:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:05,298 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 503 transitions. [2021-01-06 16:42:05,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:42:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 503 transitions. [2021-01-06 16:42:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:42:05,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:05,300 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:05,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:05,505 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash 980530326, now seen corresponding path program 1 times [2021-01-06 16:42:05,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:05,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952194803] [2021-01-06 16:42:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-01-06 16:42:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952194803] [2021-01-06 16:42:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825121974] [2021-01-06 16:42:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:06,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:42:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:07,632 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:07,632 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 131 [2021-01-06 16:42:07,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:07,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:07,639 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:07,639 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:3 [2021-01-06 16:42:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 16:42:07,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:07,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-01-06 16:42:07,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335616872] [2021-01-06 16:42:07,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:42:07,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:42:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:42:07,764 INFO L87 Difference]: Start difference. First operand 391 states and 503 transitions. Second operand 32 states. [2021-01-06 16:42:18,288 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-01-06 16:42:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:19,166 INFO L93 Difference]: Finished difference Result 1794 states and 2302 transitions. [2021-01-06 16:42:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-01-06 16:42:19,168 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2021-01-06 16:42:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:19,174 INFO L225 Difference]: With dead ends: 1794 [2021-01-06 16:42:19,175 INFO L226 Difference]: Without dead ends: 1570 [2021-01-06 16:42:19,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1571, Invalid=17611, Unknown=0, NotChecked=0, Total=19182 [2021-01-06 16:42:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-01-06 16:42:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 707. [2021-01-06 16:42:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2021-01-06 16:42:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 896 transitions. [2021-01-06 16:42:19,349 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 896 transitions. Word has length 97 [2021-01-06 16:42:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:19,349 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 896 transitions. [2021-01-06 16:42:19,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:42:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 896 transitions. [2021-01-06 16:42:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:42:19,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:19,352 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:19,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:42:19,566 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1953819476, now seen corresponding path program 2 times [2021-01-06 16:42:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:19,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54172418] [2021-01-06 16:42:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-01-06 16:42:20,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54172418] [2021-01-06 16:42:20,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748880781] [2021-01-06 16:42:20,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:20,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:42:20,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:20,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:42:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:21,499 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:21,500 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 21 [2021-01-06 16:42:21,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:21,504 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:21,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:21,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-01-06 16:42:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-01-06 16:42:21,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:21,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-01-06 16:42:21,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963751746] [2021-01-06 16:42:21,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:42:21,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:42:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:42:21,598 INFO L87 Difference]: Start difference. First operand 707 states and 896 transitions. Second operand 31 states. [2021-01-06 16:42:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:32,054 INFO L93 Difference]: Finished difference Result 2652 states and 3367 transitions. [2021-01-06 16:42:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 16:42:32,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 97 [2021-01-06 16:42:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:32,061 INFO L225 Difference]: With dead ends: 2652 [2021-01-06 16:42:32,062 INFO L226 Difference]: Without dead ends: 2252 [2021-01-06 16:42:32,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4858 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1122, Invalid=13640, Unknown=0, NotChecked=0, Total=14762 [2021-01-06 16:42:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-01-06 16:42:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 961. [2021-01-06 16:42:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2021-01-06 16:42:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1208 transitions. [2021-01-06 16:42:32,301 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1208 transitions. Word has length 97 [2021-01-06 16:42:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:32,302 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1208 transitions. [2021-01-06 16:42:32,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:42:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1208 transitions. [2021-01-06 16:42:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:42:32,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:32,305 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:32,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:42:32,518 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1386878958, now seen corresponding path program 3 times [2021-01-06 16:42:32,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:32,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182158431] [2021-01-06 16:42:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-01-06 16:42:33,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182158431] [2021-01-06 16:42:33,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25728439] [2021-01-06 16:42:33,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:34,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 16:42:34,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:42:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:42:40,110 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 16:42:40,111 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:40,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 154 [2021-01-06 16:42:40,115 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:42:40,116 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 16:42:40,121 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:40,248 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 16:42:40,249 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:40,264 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 16:42:40,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:40,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:114, output treesize:187 [2021-01-06 16:42:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 157 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-01-06 16:42:41,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:41,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 30] total 43 [2021-01-06 16:42:41,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986212423] [2021-01-06 16:42:41,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:42:41,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:42:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1609, Unknown=1, NotChecked=0, Total=1806 [2021-01-06 16:42:41,832 INFO L87 Difference]: Start difference. First operand 961 states and 1208 transitions. Second operand 43 states. [2021-01-06 16:43:43,294 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-01-06 16:43:44,258 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 16:43:44,751 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-01-06 16:43:45,659 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 16:43:49,439 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-01-06 16:43:52,206 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-01-06 16:43:54,798 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 16:43:57,146 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 16:43:57,541 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-01-06 16:44:02,370 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-01-06 16:44:06,691 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-01-06 16:44:08,671 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-01-06 16:44:13,840 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-01-06 16:44:22,640 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-01-06 16:44:22,963 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-01-06 16:44:23,363 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-01-06 16:44:28,005 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 16:44:28,805 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-01-06 16:44:31,367 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-06 16:44:31,774 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-01-06 16:44:32,379 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-01-06 16:44:36,925 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-01-06 16:44:41,325 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-01-06 16:44:45,991 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-01-06 16:44:46,541 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-01-06 16:44:47,284 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-01-06 16:44:48,042 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-01-06 16:44:52,342 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-01-06 16:44:56,657 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-01-06 16:44:57,315 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-01-06 16:44:59,787 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-01-06 16:45:04,055 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-01-06 16:45:08,376 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-01-06 16:45:10,869 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-01-06 16:45:13,243 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-01-06 16:45:17,608 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-01-06 16:45:23,343 WARN L197 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 87 DAG size of output: 82