/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-dcfa08f [2020-12-23 06:46:52,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:46:52,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:46:52,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:46:52,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:46:52,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:46:52,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:46:52,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:46:52,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:46:52,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:46:52,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:46:52,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:46:52,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:46:52,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:46:52,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:46:52,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:46:52,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:46:52,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:46:52,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:46:52,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:46:52,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:46:52,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:46:52,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:46:52,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:46:52,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:46:53,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:46:53,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:46:53,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:46:53,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:46:53,062 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:46:53,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:46:53,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:46:53,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:46:53,068 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:46:53,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:46:53,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:46:53,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:46:53,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:46:53,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:46:53,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:46:53,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:46:53,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:46:53,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:46:53,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:46:53,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:46:53,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:46:53,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:53,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:46:53,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:46:53,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:46:53,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:46:53,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:46:53,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:46:53,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:46:53,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:46:53,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:46:53,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:46:53,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:46:53,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:46:53,529 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:46:53,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-2.i [2020-12-23 06:46:53,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62ae427fd/2908230a448044c88c4d1ff9c6618564/FLAGc49da7567 [2020-12-23 06:46:54,212 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:46:54,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/vogal-2.i [2020-12-23 06:46:54,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62ae427fd/2908230a448044c88c4d1ff9c6618564/FLAGc49da7567 [2020-12-23 06:46:54,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62ae427fd/2908230a448044c88c4d1ff9c6618564 [2020-12-23 06:46:54,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:46:54,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:46:54,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:54,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:46:54,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:46:54,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:54" (1/1) ... [2020-12-23 06:46:54,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ec7cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:54, skipping insertion in model container [2020-12-23 06:46:54,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:54" (1/1) ... [2020-12-23 06:46:54,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:46:54,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:46:54,902 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,] [2020-12-23 06:46:54,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:54,965 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:46:54,982 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,] [2020-12-23 06:46:55,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:55,050 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:46:55,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55 WrapperNode [2020-12-23 06:46:55,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:55,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:55,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:46:55,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:46:55,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:55,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:46:55,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:46:55,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:46:55,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... [2020-12-23 06:46:55,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:46:55,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:46:55,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:46:55,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:46:55,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:46:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:46:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:46:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:46:55,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:46:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:46:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:46:55,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:46:55,721 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 06:46:55,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:55 BoogieIcfgContainer [2020-12-23 06:46:55,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:46:55,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:46:55,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:46:55,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:46:55,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:46:54" (1/3) ... [2020-12-23 06:46:55,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e4870f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:55, skipping insertion in model container [2020-12-23 06:46:55,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:55" (2/3) ... [2020-12-23 06:46:55,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e4870f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:55, skipping insertion in model container [2020-12-23 06:46:55,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:55" (3/3) ... [2020-12-23 06:46:55,747 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2020-12-23 06:46:55,764 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:46:55,769 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:46:55,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:46:55,831 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:46:55,831 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:46:55,832 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:46:55,832 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:46:55,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:46:55,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:46:55,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:46:55,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:46:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-23 06:46:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:46:55,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:55,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:55,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash -814739894, now seen corresponding path program 1 times [2020-12-23 06:46:55,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:55,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176692464] [2020-12-23 06:46:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176692464] [2020-12-23 06:46:56,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:56,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:46:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757927530] [2020-12-23 06:46:56,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:46:56,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:46:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:46:56,074 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-12-23 06:46:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:56,094 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2020-12-23 06:46:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:46:56,096 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-23 06:46:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:56,106 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:46:56,106 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:46:56,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:46:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:46:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 06:46:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:46:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-23 06:46:56,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2020-12-23 06:46:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:56,151 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-23 06:46:56,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:46:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-23 06:46:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:46:56,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:56,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:56,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:46:56,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1144484620, now seen corresponding path program 1 times [2020-12-23 06:46:56,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:56,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608205133] [2020-12-23 06:46:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:56,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608205133] [2020-12-23 06:46:56,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:56,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:46:56,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915883242] [2020-12-23 06:46:56,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:46:56,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:46:56,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:46:56,256 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 3 states. [2020-12-23 06:46:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:56,345 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-12-23 06:46:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:46:56,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 06:46:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:56,348 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:46:56,348 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:46:56,349 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 [2020-12-23 06:46:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:46:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2020-12-23 06:46:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:46:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-12-23 06:46:56,357 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2020-12-23 06:46:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:56,357 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-12-23 06:46:56,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:46:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-12-23 06:46:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:46:56,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:56,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:56,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:46:56,359 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1978272138, now seen corresponding path program 1 times [2020-12-23 06:46:56,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:56,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555293570] [2020-12-23 06:46:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:56,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555293570] [2020-12-23 06:46:56,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798716107] [2020-12-23 06:46:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:46:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:56,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:56,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:46:56,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099930013] [2020-12-23 06:46:56,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:56,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:56,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:56,664 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 5 states. [2020-12-23 06:46:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:56,807 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2020-12-23 06:46:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:46:56,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 06:46:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:56,810 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:46:56,810 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:46:56,811 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 [2020-12-23 06:46:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:46:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 27. [2020-12-23 06:46:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:46:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-23 06:46:56,818 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 16 [2020-12-23 06:46:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:56,818 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-23 06:46:56,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-23 06:46:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:46:56,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:56,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:57,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:46:57,023 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash -89192584, now seen corresponding path program 2 times [2020-12-23 06:46:57,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:57,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063790178] [2020-12-23 06:46:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:57,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063790178] [2020-12-23 06:46:57,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907260275] [2020-12-23 06:46:57,175 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 [2020-12-23 06:46:57,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 06:46:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:57,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:46:57,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:46:57,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:46:57,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 06:46:57,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779601219] [2020-12-23 06:46:57,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:57,346 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-12-23 06:46:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:57,403 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-23 06:46:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:46:57,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 06:46:57,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:57,405 INFO L225 Difference]: With dead ends: 53 [2020-12-23 06:46:57,405 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 06:46:57,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:46:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 06:46:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-12-23 06:46:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:46:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2020-12-23 06:46:57,414 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2020-12-23 06:46:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:57,414 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2020-12-23 06:46:57,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2020-12-23 06:46:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:46:57,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:57,417 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] [2020-12-23 06:46:57,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:57,618 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1955255585, now seen corresponding path program 1 times [2020-12-23 06:46:57,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:57,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452924449] [2020-12-23 06:46:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:57,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452924449] [2020-12-23 06:46:57,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603515885] [2020-12-23 06:46:57,748 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 [2020-12-23 06:46:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:46:57,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:57,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:57,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:46:57,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470151953] [2020-12-23 06:46:57,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:46:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:57,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:46:57,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:46:57,991 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 6 states. [2020-12-23 06:46:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:58,229 INFO L93 Difference]: Finished difference Result 156 states and 209 transitions. [2020-12-23 06:46:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:46:58,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-23 06:46:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:58,233 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:46:58,233 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 06:46:58,235 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 [2020-12-23 06:46:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 06:46:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 41. [2020-12-23 06:46:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:46:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-12-23 06:46:58,246 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2020-12-23 06:46:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:58,246 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-12-23 06:46:58,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:46:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-12-23 06:46:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:46:58,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:58,248 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] [2020-12-23 06:46:58,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:58,463 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash 116791777, now seen corresponding path program 2 times [2020-12-23 06:46:58,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:58,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898209026] [2020-12-23 06:46:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:58,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898209026] [2020-12-23 06:46:58,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450528476] [2020-12-23 06:46:58,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:58,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:58,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:46:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 06:46:58,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:58,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 06:46:58,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121378514] [2020-12-23 06:46:58,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:46:58,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:46:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:58,808 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 8 states. [2020-12-23 06:46:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:59,078 INFO L93 Difference]: Finished difference Result 265 states and 350 transitions. [2020-12-23 06:46:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:46:59,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-23 06:46:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:59,081 INFO L225 Difference]: With dead ends: 265 [2020-12-23 06:46:59,081 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 06:46:59,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:46:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 06:46:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 47. [2020-12-23 06:46:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:46:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-12-23 06:46:59,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 26 [2020-12-23 06:46:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:59,096 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-12-23 06:46:59,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:46:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-12-23 06:46:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:46:59,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:59,097 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] [2020-12-23 06:46:59,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:59,311 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash -342131421, now seen corresponding path program 1 times [2020-12-23 06:46:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:59,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274741961] [2020-12-23 06:46:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 06:46:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274741961] [2020-12-23 06:46:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220543784] [2020-12-23 06:46:59,442 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 [2020-12-23 06:46:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:59,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:46:59,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:46:59,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:59,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-12-23 06:46:59,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704646920] [2020-12-23 06:46:59,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:46:59,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:46:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:46:59,600 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 9 states. [2020-12-23 06:47:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:00,184 INFO L93 Difference]: Finished difference Result 366 states and 535 transitions. [2020-12-23 06:47:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:47:00,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 06:47:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:00,187 INFO L225 Difference]: With dead ends: 366 [2020-12-23 06:47:00,187 INFO L226 Difference]: Without dead ends: 330 [2020-12-23 06:47:00,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:47:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-23 06:47:00,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 65. [2020-12-23 06:47:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:47:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-12-23 06:47:00,205 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 29 [2020-12-23 06:47:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:00,206 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-12-23 06:47:00,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:47:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-12-23 06:47:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:47:00,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:00,208 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] [2020-12-23 06:47:00,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:47:00,423 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:00,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:00,423 INFO L82 PathProgramCache]: Analyzing trace with hash -306811540, now seen corresponding path program 2 times [2020-12-23 06:47:00,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:00,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763152010] [2020-12-23 06:47:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 06:47:00,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763152010] [2020-12-23 06:47:00,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253955059] [2020-12-23 06:47:00,618 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 [2020-12-23 06:47:00,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:00,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:00,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:47:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:47:00,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:00,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-23 06:47:00,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832206998] [2020-12-23 06:47:00,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:47:00,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:00,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:47:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:47:00,788 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 11 states. [2020-12-23 06:47:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:01,758 INFO L93 Difference]: Finished difference Result 520 states and 720 transitions. [2020-12-23 06:47:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:47:01,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-23 06:47:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:01,761 INFO L225 Difference]: With dead ends: 520 [2020-12-23 06:47:01,761 INFO L226 Difference]: Without dead ends: 468 [2020-12-23 06:47:01,763 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 [2020-12-23 06:47:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-12-23 06:47:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 79. [2020-12-23 06:47:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:47:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-12-23 06:47:01,793 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 34 [2020-12-23 06:47:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:01,794 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-12-23 06:47:01,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:47:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-12-23 06:47:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:47:01,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:01,802 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] [2020-12-23 06:47:02,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:02,018 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:02,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:02,019 INFO L82 PathProgramCache]: Analyzing trace with hash -362617921, now seen corresponding path program 3 times [2020-12-23 06:47:02,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:02,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549408791] [2020-12-23 06:47:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 06:47:02,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549408791] [2020-12-23 06:47:02,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367761076] [2020-12-23 06:47:02,222 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 [2020-12-23 06:47:02,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 06:47:02,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:47:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:02,384 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 [2020-12-23 06:47:02,385 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:02,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:02,397 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:02,397 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 06:47:02,576 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:02,576 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 [2020-12-23 06:47:02,578 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:02,580 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:02,581 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:02,581 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:3 [2020-12-23 06:47:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 06:47:02,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:47:02,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2020-12-23 06:47:02,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468557504] [2020-12-23 06:47:02,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:47:02,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:02,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:47:02,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:47:02,618 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 10 states. [2020-12-23 06:47:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:02,714 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2020-12-23 06:47:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:47:02,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-23 06:47:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:02,716 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:47:02,716 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 06:47:02,717 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 [2020-12-23 06:47:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 06:47:02,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-23 06:47:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:47:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-12-23 06:47:02,728 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 39 [2020-12-23 06:47:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:02,729 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-12-23 06:47:02,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:47:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-12-23 06:47:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:47:02,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:02,730 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] [2020-12-23 06:47:02,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:02,944 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:02,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1769349196, now seen corresponding path program 1 times [2020-12-23 06:47:02,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:02,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513494761] [2020-12-23 06:47:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 06:47:03,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513494761] [2020-12-23 06:47:03,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976604263] [2020-12-23 06:47:03,065 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 [2020-12-23 06:47:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:03,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:47:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 06:47:03,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:03,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:47:03,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348218558] [2020-12-23 06:47:03,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:47:03,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:03,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:47:03,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:47:03,211 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 10 states. [2020-12-23 06:47:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:03,675 INFO L93 Difference]: Finished difference Result 530 states and 694 transitions. [2020-12-23 06:47:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:47:03,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-12-23 06:47:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:03,679 INFO L225 Difference]: With dead ends: 530 [2020-12-23 06:47:03,679 INFO L226 Difference]: Without dead ends: 468 [2020-12-23 06:47:03,680 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 [2020-12-23 06:47:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-12-23 06:47:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 79. [2020-12-23 06:47:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:47:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-12-23 06:47:03,695 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 40 [2020-12-23 06:47:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:03,695 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-12-23 06:47:03,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:47:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-12-23 06:47:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:47:03,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:03,697 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] [2020-12-23 06:47:03,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:47:03,911 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash 478989134, now seen corresponding path program 2 times [2020-12-23 06:47:03,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:03,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578935841] [2020-12-23 06:47:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 06:47:04,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578935841] [2020-12-23 06:47:04,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674896280] [2020-12-23 06:47:04,056 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 [2020-12-23 06:47:04,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:47:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 06:47:04,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:04,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:47:04,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331727428] [2020-12-23 06:47:04,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:47:04,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:47:04,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:47:04,231 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 11 states. [2020-12-23 06:47:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:04,834 INFO L93 Difference]: Finished difference Result 588 states and 770 transitions. [2020-12-23 06:47:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:47:04,835 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-12-23 06:47:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:04,838 INFO L225 Difference]: With dead ends: 588 [2020-12-23 06:47:04,838 INFO L226 Difference]: Without dead ends: 526 [2020-12-23 06:47:04,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:47:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-12-23 06:47:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 81. [2020-12-23 06:47:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 06:47:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-12-23 06:47:04,855 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 42 [2020-12-23 06:47:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:04,855 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-12-23 06:47:04,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:47:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-12-23 06:47:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:47:04,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:04,857 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] [2020-12-23 06:47:05,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:05,070 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1688518096, now seen corresponding path program 3 times [2020-12-23 06:47:05,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:05,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725913140] [2020-12-23 06:47:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 06:47:05,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725913140] [2020-12-23 06:47:05,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081395451] [2020-12-23 06:47:05,251 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 [2020-12-23 06:47:05,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 06:47:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:05,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:47:05,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:05,539 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 [2020-12-23 06:47:05,540 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:05,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:05,543 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:05,544 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-12-23 06:47:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 06:47:05,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:05,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2020-12-23 06:47:05,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679742825] [2020-12-23 06:47:05,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:47:05,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:47:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:47:05,571 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 17 states. [2020-12-23 06:47:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:06,768 INFO L93 Difference]: Finished difference Result 642 states and 843 transitions. [2020-12-23 06:47:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:47:06,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-12-23 06:47:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:06,772 INFO L225 Difference]: With dead ends: 642 [2020-12-23 06:47:06,772 INFO L226 Difference]: Without dead ends: 580 [2020-12-23 06:47:06,774 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 [2020-12-23 06:47:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-12-23 06:47:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 85. [2020-12-23 06:47:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:47:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2020-12-23 06:47:06,796 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 44 [2020-12-23 06:47:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:06,797 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2020-12-23 06:47:06,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:47:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2020-12-23 06:47:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:47:06,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:06,800 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] [2020-12-23 06:47:07,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:07,014 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash 417034868, now seen corresponding path program 1 times [2020-12-23 06:47:07,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:07,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578952163] [2020-12-23 06:47:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:47:07,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578952163] [2020-12-23 06:47:07,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631981673] [2020-12-23 06:47:07,231 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 [2020-12-23 06:47:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:07,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:47:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:47:07,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:07,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:47:07,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51617449] [2020-12-23 06:47:07,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:47:07,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:07,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:47:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:47:07,408 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand 13 states. [2020-12-23 06:47:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:08,265 INFO L93 Difference]: Finished difference Result 702 states and 920 transitions. [2020-12-23 06:47:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:47:08,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-12-23 06:47:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:08,269 INFO L225 Difference]: With dead ends: 702 [2020-12-23 06:47:08,269 INFO L226 Difference]: Without dead ends: 638 [2020-12-23 06:47:08,270 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 [2020-12-23 06:47:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-12-23 06:47:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 87. [2020-12-23 06:47:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:47:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-12-23 06:47:08,293 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 47 [2020-12-23 06:47:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:08,293 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-12-23 06:47:08,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:47:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-12-23 06:47:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 06:47:08,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:08,294 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] [2020-12-23 06:47:08,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:47:08,509 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 432062770, now seen corresponding path program 2 times [2020-12-23 06:47:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:08,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880067235] [2020-12-23 06:47:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 06:47:08,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880067235] [2020-12-23 06:47:08,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240220063] [2020-12-23 06:47:08,640 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 [2020-12-23 06:47:08,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:47:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 06:47:08,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:08,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:47:08,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955147843] [2020-12-23 06:47:08,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:47:08,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:08,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:47:08,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:47:08,807 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 7 states. [2020-12-23 06:47:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:08,911 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2020-12-23 06:47:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:47:08,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-12-23 06:47:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:08,913 INFO L225 Difference]: With dead ends: 165 [2020-12-23 06:47:08,913 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 06:47:08,913 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 [2020-12-23 06:47:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 06:47:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-12-23 06:47:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 06:47:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2020-12-23 06:47:08,931 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 49 [2020-12-23 06:47:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:08,932 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2020-12-23 06:47:08,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:47:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2020-12-23 06:47:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:47:08,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:08,933 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] [2020-12-23 06:47:09,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:47:09,147 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash -390681093, now seen corresponding path program 3 times [2020-12-23 06:47:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:09,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372722874] [2020-12-23 06:47:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-23 06:47:09,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372722874] [2020-12-23 06:47:09,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451561632] [2020-12-23 06:47:09,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:09,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 06:47:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:09,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:47:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 06:47:09,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:09,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 06:47:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213446676] [2020-12-23 06:47:09,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:47:09,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:47:09,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:47:09,431 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand 10 states. [2020-12-23 06:47:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:09,870 INFO L93 Difference]: Finished difference Result 359 states and 484 transitions. [2020-12-23 06:47:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:47:09,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-12-23 06:47:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:09,872 INFO L225 Difference]: With dead ends: 359 [2020-12-23 06:47:09,873 INFO L226 Difference]: Without dead ends: 289 [2020-12-23 06:47:09,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:47:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-23 06:47:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 115. [2020-12-23 06:47:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 06:47:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2020-12-23 06:47:09,894 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 52 [2020-12-23 06:47:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:09,895 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2020-12-23 06:47:09,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:47:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2020-12-23 06:47:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 06:47:09,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:09,896 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] [2020-12-23 06:47:10,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:47:10,111 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash 845868301, now seen corresponding path program 4 times [2020-12-23 06:47:10,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:10,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248801994] [2020-12-23 06:47:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-23 06:47:10,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248801994] [2020-12-23 06:47:10,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330454234] [2020-12-23 06:47:10,222 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 [2020-12-23 06:47:10,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:10,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:47:10,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:10,515 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 [2020-12-23 06:47:10,517 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:10,519 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:10,520 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:10,520 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-12-23 06:47:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-12-23 06:47:10,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:10,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2020-12-23 06:47:10,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438177887] [2020-12-23 06:47:10,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:47:10,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:10,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:47:10,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:47:10,548 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand 16 states. [2020-12-23 06:47:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:11,941 INFO L93 Difference]: Finished difference Result 505 states and 685 transitions. [2020-12-23 06:47:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:47:11,941 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-12-23 06:47:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:11,944 INFO L225 Difference]: With dead ends: 505 [2020-12-23 06:47:11,945 INFO L226 Difference]: Without dead ends: 423 [2020-12-23 06:47:11,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:47:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-12-23 06:47:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 214. [2020-12-23 06:47:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-23 06:47:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 277 transitions. [2020-12-23 06:47:11,990 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 277 transitions. Word has length 57 [2020-12-23 06:47:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:11,991 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 277 transitions. [2020-12-23 06:47:11,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:47:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 277 transitions. [2020-12-23 06:47:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 06:47:11,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:11,992 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] [2020-12-23 06:47:12,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:12,206 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2013020394, now seen corresponding path program 1 times [2020-12-23 06:47:12,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:12,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193653217] [2020-12-23 06:47:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 06:47:12,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193653217] [2020-12-23 06:47:12,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901690953] [2020-12-23 06:47:12,355 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 [2020-12-23 06:47:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:47:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 06:47:12,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:12,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:47:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889863563] [2020-12-23 06:47:12,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:47:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:12,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:47:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:47:12,578 INFO L87 Difference]: Start difference. First operand 214 states and 277 transitions. Second operand 10 states. [2020-12-23 06:47:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:12,829 INFO L93 Difference]: Finished difference Result 435 states and 582 transitions. [2020-12-23 06:47:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:47:12,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-12-23 06:47:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:12,831 INFO L225 Difference]: With dead ends: 435 [2020-12-23 06:47:12,831 INFO L226 Difference]: Without dead ends: 254 [2020-12-23 06:47:12,832 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 [2020-12-23 06:47:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-23 06:47:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2020-12-23 06:47:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-23 06:47:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 309 transitions. [2020-12-23 06:47:12,877 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 309 transitions. Word has length 79 [2020-12-23 06:47:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:12,877 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 309 transitions. [2020-12-23 06:47:12,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:47:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 309 transitions. [2020-12-23 06:47:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 06:47:12,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:12,879 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] [2020-12-23 06:47:13,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:47:13,093 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1346089899, now seen corresponding path program 2 times [2020-12-23 06:47:13,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:13,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890196451] [2020-12-23 06:47:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-12-23 06:47:13,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890196451] [2020-12-23 06:47:13,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220212119] [2020-12-23 06:47:13,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:13,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:47:13,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:47:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-12-23 06:47:13,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:13,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:47:13,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996203115] [2020-12-23 06:47:13,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:47:13,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:47:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:47:13,471 INFO L87 Difference]: Start difference. First operand 238 states and 309 transitions. Second operand 11 states. [2020-12-23 06:47:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:13,759 INFO L93 Difference]: Finished difference Result 483 states and 646 transitions. [2020-12-23 06:47:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:47:13,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-12-23 06:47:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:13,762 INFO L225 Difference]: With dead ends: 483 [2020-12-23 06:47:13,762 INFO L226 Difference]: Without dead ends: 278 [2020-12-23 06:47:13,763 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 [2020-12-23 06:47:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-23 06:47:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 262. [2020-12-23 06:47:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-23 06:47:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 341 transitions. [2020-12-23 06:47:13,829 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 341 transitions. Word has length 85 [2020-12-23 06:47:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:13,830 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 341 transitions. [2020-12-23 06:47:13,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:47:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 341 transitions. [2020-12-23 06:47:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 06:47:13,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:13,831 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] [2020-12-23 06:47:14,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:47:14,046 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash 20519926, now seen corresponding path program 3 times [2020-12-23 06:47:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:14,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457187184] [2020-12-23 06:47:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 06:47:14,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457187184] [2020-12-23 06:47:14,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354074138] [2020-12-23 06:47:14,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:15,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:47:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:15,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:47:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 06:47:15,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:15,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:47:15,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650834396] [2020-12-23 06:47:15,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:47:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:47:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:47:15,518 INFO L87 Difference]: Start difference. First operand 262 states and 341 transitions. Second operand 12 states. [2020-12-23 06:47:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:15,831 INFO L93 Difference]: Finished difference Result 519 states and 687 transitions. [2020-12-23 06:47:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:47:15,832 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-12-23 06:47:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:15,834 INFO L225 Difference]: With dead ends: 519 [2020-12-23 06:47:15,834 INFO L226 Difference]: Without dead ends: 290 [2020-12-23 06:47:15,835 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 [2020-12-23 06:47:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-23 06:47:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 274. [2020-12-23 06:47:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-23 06:47:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 353 transitions. [2020-12-23 06:47:15,888 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 353 transitions. Word has length 91 [2020-12-23 06:47:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:15,888 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 353 transitions. [2020-12-23 06:47:15,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:47:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 353 transitions. [2020-12-23 06:47:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 06:47:15,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:15,890 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] [2020-12-23 06:47:16,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:16,095 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1468083383, now seen corresponding path program 4 times [2020-12-23 06:47:16,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:16,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274971067] [2020-12-23 06:47:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 06:47:16,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274971067] [2020-12-23 06:47:16,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734733636] [2020-12-23 06:47:16,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:16,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:47:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:16,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:47:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 06:47:16,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:16,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:47:16,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222851633] [2020-12-23 06:47:16,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:47:16,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:47:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:47:16,603 INFO L87 Difference]: Start difference. First operand 274 states and 353 transitions. Second operand 13 states. [2020-12-23 06:47:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:16,945 INFO L93 Difference]: Finished difference Result 371 states and 483 transitions. [2020-12-23 06:47:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:47:16,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2020-12-23 06:47:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:16,948 INFO L225 Difference]: With dead ends: 371 [2020-12-23 06:47:16,948 INFO L226 Difference]: Without dead ends: 302 [2020-12-23 06:47:16,949 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 [2020-12-23 06:47:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-12-23 06:47:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2020-12-23 06:47:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 06:47:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 369 transitions. [2020-12-23 06:47:16,999 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 369 transitions. Word has length 94 [2020-12-23 06:47:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:16,999 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 369 transitions. [2020-12-23 06:47:17,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:47:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 369 transitions. [2020-12-23 06:47:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:47:17,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:17,001 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] [2020-12-23 06:47:17,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:17,215 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:17,216 INFO L82 PathProgramCache]: Analyzing trace with hash 64411734, now seen corresponding path program 5 times [2020-12-23 06:47:17,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:17,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902588692] [2020-12-23 06:47:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-23 06:47:17,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902588692] [2020-12-23 06:47:17,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524317997] [2020-12-23 06:47:17,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:20,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:47:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:47:20,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 06:47:20,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:20,047 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 [2020-12-23 06:47:20,049 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,060 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,061 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,061 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-23 06:47:20,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,110 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 [2020-12-23 06:47:20,111 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,126 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,127 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,128 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:32 [2020-12-23 06:47:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,191 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 [2020-12-23 06:47:20,195 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,227 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2020-12-23 06:47:20,229 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2020-12-23 06:47:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,291 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 [2020-12-23 06:47:20,295 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,334 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2020-12-23 06:47:20,342 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,343 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2020-12-23 06:47:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,400 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 [2020-12-23 06:47:20,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,431 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2020-12-23 06:47:20,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2020-12-23 06:47:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,493 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 [2020-12-23 06:47:20,495 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,524 INFO L625 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2020-12-23 06:47:20,526 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,526 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2020-12-23 06:47:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,580 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 [2020-12-23 06:47:20,582 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:29 [2020-12-23 06:47:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,647 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 [2020-12-23 06:47:20,650 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,663 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,665 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,666 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2020-12-23 06:47:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,680 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 [2020-12-23 06:47:20,682 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,695 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,697 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,697 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2020-12-23 06:47:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,710 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 [2020-12-23 06:47:20,712 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,727 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,730 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,731 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2020-12-23 06:47:20,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,752 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 [2020-12-23 06:47:20,753 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,766 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,768 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:29 [2020-12-23 06:47:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:20,785 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 [2020-12-23 06:47:20,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:20,800 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:20,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 06:47:23,336 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 06:47:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:47:23,339 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 [2020-12-23 06:47:23,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:23,357 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 06:47:23,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:23,360 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2020-12-23 06:47:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 180 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-23 06:47:23,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:23,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29] total 41 [2020-12-23 06:47:23,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013342868] [2020-12-23 06:47:23,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:47:23,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:23,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:47:23,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:47:23,565 INFO L87 Difference]: Start difference. First operand 286 states and 369 transitions. Second operand 41 states. [2020-12-23 06:47:27,114 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-23 06:47:28,225 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-12-23 06:47:32,302 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-23 06:47:40,458 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 06:47:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:51,335 INFO L93 Difference]: Finished difference Result 2402 states and 3137 transitions. [2020-12-23 06:47:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2020-12-23 06:47:51,336 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 97 [2020-12-23 06:47:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:51,347 INFO L225 Difference]: With dead ends: 2402 [2020-12-23 06:47:51,348 INFO L226 Difference]: Without dead ends: 2272 [2020-12-23 06:47:51,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22338 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=3197, Invalid=53685, Unknown=0, NotChecked=0, Total=56882 [2020-12-23 06:47:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2020-12-23 06:47:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 391. [2020-12-23 06:47:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-12-23 06:47:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 503 transitions. [2020-12-23 06:47:51,478 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 503 transitions. Word has length 97 [2020-12-23 06:47:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:51,479 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 503 transitions. [2020-12-23 06:47:51,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:47:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 503 transitions. [2020-12-23 06:47:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:47:51,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:51,481 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] [2020-12-23 06:47:51,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:51,688 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash 980530326, now seen corresponding path program 1 times [2020-12-23 06:47:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:51,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173904500] [2020-12-23 06:47:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-12-23 06:47:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173904500] [2020-12-23 06:47:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8322161] [2020-12-23 06:47:52,349 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 [2020-12-23 06:47:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:47:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:53,800 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:53,801 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 [2020-12-23 06:47:53,804 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:47:53,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:47:53,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:47:53,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:3 [2020-12-23 06:47:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-12-23 06:47:53,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:53,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2020-12-23 06:47:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739076753] [2020-12-23 06:47:53,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:47:53,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:47:53,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:47:53,916 INFO L87 Difference]: Start difference. First operand 391 states and 503 transitions. Second operand 32 states. [2020-12-23 06:48:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:48:05,131 INFO L93 Difference]: Finished difference Result 1794 states and 2302 transitions. [2020-12-23 06:48:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-12-23 06:48:05,134 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-12-23 06:48:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:48:05,141 INFO L225 Difference]: With dead ends: 1794 [2020-12-23 06:48:05,142 INFO L226 Difference]: Without dead ends: 1570 [2020-12-23 06:48:05,145 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 [2020-12-23 06:48:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2020-12-23 06:48:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 707. [2020-12-23 06:48:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-12-23 06:48:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 896 transitions. [2020-12-23 06:48:05,330 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 896 transitions. Word has length 97 [2020-12-23 06:48:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:48:05,331 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 896 transitions. [2020-12-23 06:48:05,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:48:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 896 transitions. [2020-12-23 06:48:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:48:05,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:48:05,333 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] [2020-12-23 06:48:05,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:48:05,547 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:48:05,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:48:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1953819476, now seen corresponding path program 2 times [2020-12-23 06:48:05,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:48:05,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014530161] [2020-12-23 06:48:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:48:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:48:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 06:48:06,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014530161] [2020-12-23 06:48:06,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462780696] [2020-12-23 06:48:06,413 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 [2020-12-23 06:48:06,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:48:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:48:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:48:06,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:48:07,440 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:48:07,441 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 [2020-12-23 06:48:07,445 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:48:07,451 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:48:07,452 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:48:07,453 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2020-12-23 06:48:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-12-23 06:48:07,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:48:07,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2020-12-23 06:48:07,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265594653] [2020-12-23 06:48:07,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:48:07,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:48:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:48:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:48:07,546 INFO L87 Difference]: Start difference. First operand 707 states and 896 transitions. Second operand 31 states. [2020-12-23 06:48:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:48:18,533 INFO L93 Difference]: Finished difference Result 2652 states and 3367 transitions. [2020-12-23 06:48:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-23 06:48:18,533 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 97 [2020-12-23 06:48:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:48:18,543 INFO L225 Difference]: With dead ends: 2652 [2020-12-23 06:48:18,543 INFO L226 Difference]: Without dead ends: 2252 [2020-12-23 06:48:18,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4858 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1122, Invalid=13640, Unknown=0, NotChecked=0, Total=14762 [2020-12-23 06:48:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2020-12-23 06:48:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 961. [2020-12-23 06:48:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-23 06:48:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1208 transitions. [2020-12-23 06:48:18,748 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1208 transitions. Word has length 97 [2020-12-23 06:48:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:48:18,749 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1208 transitions. [2020-12-23 06:48:18,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:48:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1208 transitions. [2020-12-23 06:48:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:48:18,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:48:18,752 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] [2020-12-23 06:48:18,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:48:18,963 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:48:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:48:18,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1386878958, now seen corresponding path program 3 times [2020-12-23 06:48:18,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:48:18,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561071966] [2020-12-23 06:48:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:48:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:48:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 06:48:19,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561071966] [2020-12-23 06:48:19,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804415315] [2020-12-23 06:48:19,983 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 [2020-12-23 06:48:21,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 06:48:21,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:48:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:48:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:48:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:48:26,357 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 06:48:26,358 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:48:26,358 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 [2020-12-23 06:48:26,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:48:26,363 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:48:26,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:48:26,498 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-23 06:48:26,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:48:26,544 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:48:26,575 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:48:26,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:114, output treesize:187 [2020-12-23 06:48:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 157 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-23 06:48:27,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:48:27,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 30] total 43 [2020-12-23 06:48:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062643027] [2020-12-23 06:48:27,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:48:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:48:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:48:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1609, Unknown=1, NotChecked=0, Total=1806 [2020-12-23 06:48:27,999 INFO L87 Difference]: Start difference. First operand 961 states and 1208 transitions. Second operand 43 states. [2020-12-23 06:49:09,561 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 06:49:22,591 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 06:49:24,753 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-23 06:49:25,641 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 06:49:27,763 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-23 06:49:28,627 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-23 06:49:32,088 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-23 06:49:34,736 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 06:49:37,016 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 06:49:37,415 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-23 06:49:42,302 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-23 06:49:45,101 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-23 06:49:45,679 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-23 06:49:51,124 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-23 06:50:01,253 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-12-23 06:50:01,623 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-12-23 06:50:02,259 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-23 06:50:04,826 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 06:50:05,160 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-23 06:50:07,448 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 06:50:08,018 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-23 06:50:08,421 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-23 06:50:11,178 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-23 06:50:13,713 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-23 06:50:19,571 WARN L197 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-12-23 06:50:22,106 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-23 06:50:23,039 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-12-23 06:50:23,442 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-12-23 06:50:24,610 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-12-23 06:50:28,223 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-23 06:50:32,547 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-23 06:50:35,841 WARN L197 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-12-23 06:50:40,168 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-12-23 06:50:43,510 WARN L197 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-12-23 06:50:44,429 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-23 06:50:45,451 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-23 06:50:49,731 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-23 06:50:54,797 WARN L197 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-12-23 06:50:59,136 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-12-23 06:51:02,548 WARN L197 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2020-12-23 06:51:07,106 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 06:51:07,667 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51