/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:41:07,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:41:07,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:41:07,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:41:07,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:41:07,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:41:07,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:41:07,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:41:07,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:41:07,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:41:07,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:41:07,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:41:07,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:41:07,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:41:07,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:41:07,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:41:07,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:41:07,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:41:07,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:41:07,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:41:07,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:41:07,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:41:07,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:41:07,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:41:07,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:41:07,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:41:07,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:41:07,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:41:07,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:41:07,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:41:07,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:41:07,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:41:07,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:41:07,219 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:41:07,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:41:07,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:41:07,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:41:07,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:41:07,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:41:07,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:41:07,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:41:07,222 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:41:07,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:41:07,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:41:07,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:41:07,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:41:07,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:07,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:41:07,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:41:07,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:41:07,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:41:07,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:41:07,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:41:07,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:41:07,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:41:07,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:41:07,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:41:07,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:41:07,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:41:07,612 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:41:07,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/vogal-1.i [2021-01-06 16:41:07,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/23aeda53f/ab5750ccbd2e4701b4f95bbc9847b162/FLAG678052d8e [2021-01-06 16:41:08,424 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:41:08,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/vogal-1.i [2021-01-06 16:41:08,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/23aeda53f/ab5750ccbd2e4701b4f95bbc9847b162/FLAG678052d8e [2021-01-06 16:41:08,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/23aeda53f/ab5750ccbd2e4701b4f95bbc9847b162 [2021-01-06 16:41:08,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:41:08,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:41:08,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:08,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:41:08,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:41:08,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576094a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08, skipping insertion in model container [2021-01-06 16:41:08,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:41:08,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:41:09,079 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-1.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~input_string~0,],[BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: VariableLHS[~n_caracter~0,] left hand side expression in assignment: lhs: VariableLHS[~cont~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 16:41:09,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:09,161 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:41:09,179 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-1.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#input_string~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#input_string~0,],offset],BinaryExpression[ARITHMOD,IdentifierExpression[~i~0,],IntegerLiteral[4294967296]]]]] left hand side expression in assignment: lhs: VariableLHS[~n_caracter~0,] left hand side expression in assignment: lhs: VariableLHS[~cont~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 16:41:09,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:09,224 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:41:09,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09 WrapperNode [2021-01-06 16:41:09,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:09,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:09,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:41:09,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:41:09,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:09,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:41:09,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:41:09,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:41:09,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... [2021-01-06 16:41:09,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:41:09,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:41:09,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:41:09,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:41:09,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:41:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:41:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:41:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:41:09,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:41:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:41:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:41:09,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:41:09,934 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 16:41:09,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:09 BoogieIcfgContainer [2021-01-06 16:41:09,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:41:09,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:41:09,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:41:09,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:41:09,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:41:08" (1/3) ... [2021-01-06 16:41:09,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c422dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:09, skipping insertion in model container [2021-01-06 16:41:09,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:09" (2/3) ... [2021-01-06 16:41:09,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c422dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:09, skipping insertion in model container [2021-01-06 16:41:09,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:09" (3/3) ... [2021-01-06 16:41:09,959 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2021-01-06 16:41:09,972 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:41:09,977 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:41:10,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:41:10,029 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:41:10,029 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:41:10,029 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:41:10,029 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:41:10,029 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:41:10,030 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:41:10,030 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:41:10,030 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:41:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-01-06 16:41:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:41:10,053 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:10,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:10,055 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:10,062 INFO L82 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2021-01-06 16:41:10,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:10,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690090497] [2021-01-06 16:41:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:10,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690090497] [2021-01-06 16:41:10,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:10,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:41:10,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791866813] [2021-01-06 16:41:10,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:41:10,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:10,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:41:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:10,279 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2021-01-06 16:41:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:10,300 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2021-01-06 16:41:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:41:10,301 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2021-01-06 16:41:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:10,311 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:41:10,311 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:41:10,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:41:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:41:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:41:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-01-06 16:41:10,353 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2021-01-06 16:41:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:10,354 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-01-06 16:41:10,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:41:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-01-06 16:41:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:41:10,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:10,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:10,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:41:10,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2021-01-06 16:41:10,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:10,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468920587] [2021-01-06 16:41:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:10,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468920587] [2021-01-06 16:41:10,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:10,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:41:10,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948897941] [2021-01-06 16:41:10,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:41:10,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:41:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:10,502 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 3 states. [2021-01-06 16:41:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:10,605 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-01-06 16:41:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:41:10,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 16:41:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:10,608 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:41:10,608 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:41:10,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:10,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:41:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-01-06 16:41:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:41:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-01-06 16:41:10,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2021-01-06 16:41:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:10,617 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-01-06 16:41:10,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:41:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-01-06 16:41:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:41:10,618 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:10,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:10,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:41:10,619 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2021-01-06 16:41:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:10,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744166276] [2021-01-06 16:41:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:10,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744166276] [2021-01-06 16:41:10,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860213839] [2021-01-06 16:41:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:41:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:10,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:10,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:41:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448737741] [2021-01-06 16:41:10,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:10,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:10,919 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2021-01-06 16:41:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:11,107 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-01-06 16:41:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:11,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 16:41:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:11,115 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:41:11,116 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 16:41:11,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 16:41:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 28. [2021-01-06 16:41:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:41:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-01-06 16:41:11,134 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2021-01-06 16:41:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,135 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-01-06 16:41:11,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-01-06 16:41:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:41:11,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:11,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:41:11,340 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,342 INFO L82 PathProgramCache]: Analyzing trace with hash 632663215, now seen corresponding path program 2 times [2021-01-06 16:41:11,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920799492] [2021-01-06 16:41:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:11,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920799492] [2021-01-06 16:41:11,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54113903] [2021-01-06 16:41:11,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:11,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 16:41:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:11,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:41:11,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 16:41:11,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493305311] [2021-01-06 16:41:11,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:11,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:11,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:41:11,642 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2021-01-06 16:41:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:11,693 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-01-06 16:41:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:41:11,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-01-06 16:41:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:11,695 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:41:11,695 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:41:11,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:41:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-01-06 16:41:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:41:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-01-06 16:41:11,704 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 19 [2021-01-06 16:41:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,705 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-01-06 16:41:11,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-01-06 16:41:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:41:11,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:11,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:11,918 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1535912778, now seen corresponding path program 1 times [2021-01-06 16:41:11,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939847884] [2021-01-06 16:41:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:41:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939847884] [2021-01-06 16:41:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875749358] [2021-01-06 16:41:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:12,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:41:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:41:12,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:41:12,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-01-06 16:41:12,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413638363] [2021-01-06 16:41:12,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:41:12,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:41:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:12,331 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 4 states. [2021-01-06 16:41:12,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:12,430 INFO L93 Difference]: Finished difference Result 99 states and 131 transitions. [2021-01-06 16:41:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:12,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-01-06 16:41:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:12,433 INFO L225 Difference]: With dead ends: 99 [2021-01-06 16:41:12,433 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 16:41:12,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 16:41:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2021-01-06 16:41:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:41:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2021-01-06 16:41:12,444 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 25 [2021-01-06 16:41:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:12,445 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2021-01-06 16:41:12,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:41:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2021-01-06 16:41:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:41:12,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:12,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:12,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:12,660 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1129348299, now seen corresponding path program 1 times [2021-01-06 16:41:12,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:12,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430497803] [2021-01-06 16:41:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:41:12,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430497803] [2021-01-06 16:41:12,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977211959] [2021-01-06 16:41:12,757 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:12,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:41:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:12,974 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 16:41:12,976 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:12,980 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:12,981 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:12,981 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2021-01-06 16:41:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:41:13,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:41:13,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-01-06 16:41:13,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822537070] [2021-01-06 16:41:13,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:41:13,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:13,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:41:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:13,005 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand 8 states. [2021-01-06 16:41:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:13,124 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-01-06 16:41:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:41:13,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 16:41:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:13,126 INFO L225 Difference]: With dead ends: 63 [2021-01-06 16:41:13,127 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:41:13,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:41:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:41:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 16:41:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:41:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-01-06 16:41:13,134 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 26 [2021-01-06 16:41:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:13,135 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-01-06 16:41:13,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:41:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-01-06 16:41:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:41:13,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:13,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:13,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:13,350 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1684188283, now seen corresponding path program 1 times [2021-01-06 16:41:13,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:13,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108174287] [2021-01-06 16:41:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:13,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108174287] [2021-01-06 16:41:13,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745841164] [2021-01-06 16:41:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:41:13,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:13,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:13,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:41:13,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773637954] [2021-01-06 16:41:13,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:41:13,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:13,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:41:13,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:13,570 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 6 states. [2021-01-06 16:41:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:13,714 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2021-01-06 16:41:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:41:13,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-01-06 16:41:13,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:13,718 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:41:13,718 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 16:41:13,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 16:41:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 44. [2021-01-06 16:41:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:41:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-01-06 16:41:13,729 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 27 [2021-01-06 16:41:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:13,729 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-01-06 16:41:13,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:41:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-01-06 16:41:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:41:13,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:13,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:13,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:41:13,946 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1517795783, now seen corresponding path program 2 times [2021-01-06 16:41:13,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:13,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883611770] [2021-01-06 16:41:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:14,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883611770] [2021-01-06 16:41:14,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016349288] [2021-01-06 16:41:14,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:14,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:14,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:41:14,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:14,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:14,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:41:14,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895067685] [2021-01-06 16:41:14,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:14,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:14,256 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 7 states. [2021-01-06 16:41:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:14,470 INFO L93 Difference]: Finished difference Result 192 states and 255 transitions. [2021-01-06 16:41:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:41:14,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2021-01-06 16:41:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:14,472 INFO L225 Difference]: With dead ends: 192 [2021-01-06 16:41:14,473 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 16:41:14,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 16:41:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 46. [2021-01-06 16:41:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:41:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-01-06 16:41:14,484 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2021-01-06 16:41:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:14,484 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-01-06 16:41:14,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-01-06 16:41:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:41:14,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:14,485 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, 1, 1] [2021-01-06 16:41:14,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:14,701 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash 867068023, now seen corresponding path program 3 times [2021-01-06 16:41:14,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:14,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200927442] [2021-01-06 16:41:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 16:41:14,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200927442] [2021-01-06 16:41:14,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547441714] [2021-01-06 16:41:14,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:14,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:41:14,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:41:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:15,011 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-01-06 16:41:15,013 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:15,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:15,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:15,016 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2021-01-06 16:41:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 16:41:15,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:15,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-01-06 16:41:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514717754] [2021-01-06 16:41:15,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:41:15,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:41:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:15,042 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 13 states. [2021-01-06 16:41:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:15,558 INFO L93 Difference]: Finished difference Result 218 states and 292 transitions. [2021-01-06 16:41:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:41:15,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2021-01-06 16:41:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:15,560 INFO L225 Difference]: With dead ends: 218 [2021-01-06 16:41:15,561 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 16:41:15,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:41:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 16:41:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 50. [2021-01-06 16:41:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:41:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-01-06 16:41:15,575 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2021-01-06 16:41:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:15,576 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-01-06 16:41:15,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:41:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-01-06 16:41:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:41:15,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:15,578 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:15,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:15,793 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash 477246614, now seen corresponding path program 1 times [2021-01-06 16:41:15,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:15,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013615616] [2021-01-06 16:41:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 16:41:15,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013615616] [2021-01-06 16:41:15,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921778089] [2021-01-06 16:41:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:41:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 16:41:16,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:16,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:41:16,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928847672] [2021-01-06 16:41:16,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:16,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:16,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:16,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:16,052 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 5 states. [2021-01-06 16:41:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:16,105 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2021-01-06 16:41:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:16,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2021-01-06 16:41:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:16,107 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:41:16,107 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:41:16,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:41:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-01-06 16:41:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 16:41:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-01-06 16:41:16,145 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 34 [2021-01-06 16:41:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:16,149 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-01-06 16:41:16,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-01-06 16:41:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:41:16,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:16,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:16,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:41:16,365 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1356456828, now seen corresponding path program 2 times [2021-01-06 16:41:16,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:16,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159314459] [2021-01-06 16:41:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 16:41:16,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159314459] [2021-01-06 16:41:16,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807432614] [2021-01-06 16:41:16,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:16,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:16,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:41:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:41:16,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:16,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2021-01-06 16:41:16,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793836125] [2021-01-06 16:41:16,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:41:16,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:41:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:41:16,919 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 14 states. [2021-01-06 16:41:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:17,360 INFO L93 Difference]: Finished difference Result 474 states and 616 transitions. [2021-01-06 16:41:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:41:17,361 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2021-01-06 16:41:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:17,364 INFO L225 Difference]: With dead ends: 474 [2021-01-06 16:41:17,364 INFO L226 Difference]: Without dead ends: 428 [2021-01-06 16:41:17,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:41:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-01-06 16:41:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 90. [2021-01-06 16:41:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 16:41:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-01-06 16:41:17,387 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 37 [2021-01-06 16:41:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:17,387 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-01-06 16:41:17,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:41:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-01-06 16:41:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:41:17,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:17,389 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:17,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:17,603 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash -42931898, now seen corresponding path program 3 times [2021-01-06 16:41:17,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:17,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241867475] [2021-01-06 16:41:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 16:41:17,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241867475] [2021-01-06 16:41:17,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225090755] [2021-01-06 16:41:17,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:17,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:41:17,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:41:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:18,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:41:18,086 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:18,086 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-01-06 16:41:18,088 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:18,093 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:18,096 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:18,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-01-06 16:41:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-01-06 16:41:18,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:41:18,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-01-06 16:41:18,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040443230] [2021-01-06 16:41:18,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:41:18,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:41:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:41:18,129 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 9 states. [2021-01-06 16:41:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:18,368 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2021-01-06 16:41:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:41:18,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2021-01-06 16:41:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:18,372 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:41:18,372 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 16:41:18,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:41:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 16:41:18,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-01-06 16:41:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:41:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-01-06 16:41:18,394 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 41 [2021-01-06 16:41:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:18,394 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-01-06 16:41:18,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:41:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-01-06 16:41:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:41:18,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:18,397 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:18,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:18,613 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 1 times [2021-01-06 16:41:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:18,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223594597] [2021-01-06 16:41:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 16:41:18,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223594597] [2021-01-06 16:41:18,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851340723] [2021-01-06 16:41:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:18,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:41:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:19,067 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:41:19,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:41:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 16:41:19,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:19,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2021-01-06 16:41:19,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668749655] [2021-01-06 16:41:19,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:41:19,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:41:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:41:19,102 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand 14 states. [2021-01-06 16:41:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:20,239 INFO L93 Difference]: Finished difference Result 489 states and 629 transitions. [2021-01-06 16:41:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:41:20,240 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2021-01-06 16:41:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:20,242 INFO L225 Difference]: With dead ends: 489 [2021-01-06 16:41:20,243 INFO L226 Difference]: Without dead ends: 479 [2021-01-06 16:41:20,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:41:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-01-06 16:41:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 141. [2021-01-06 16:41:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 16:41:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2021-01-06 16:41:20,270 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 183 transitions. Word has length 46 [2021-01-06 16:41:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:20,270 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 183 transitions. [2021-01-06 16:41:20,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:41:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 183 transitions. [2021-01-06 16:41:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:41:20,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:20,272 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:20,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:41:20,486 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:20,487 INFO L82 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2021-01-06 16:41:20,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:20,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204465190] [2021-01-06 16:41:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:41:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204465190] [2021-01-06 16:41:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917705673] [2021-01-06 16:41:20,919 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:41:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:21,644 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:21,644 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 50 [2021-01-06 16:41:21,648 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:21,665 INFO L625 ElimStorePlain]: treesize reduction 19, result has 34.5 percent of original size [2021-01-06 16:41:21,668 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:21,668 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:36, output treesize:3 [2021-01-06 16:41:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:41:21,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:21,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-01-06 16:41:21,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577398121] [2021-01-06 16:41:21,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:41:21,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:21,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:41:21,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:41:21,705 INFO L87 Difference]: Start difference. First operand 141 states and 183 transitions. Second operand 21 states. [2021-01-06 16:41:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:26,073 INFO L93 Difference]: Finished difference Result 625 states and 834 transitions. [2021-01-06 16:41:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:41:26,074 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2021-01-06 16:41:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:26,077 INFO L225 Difference]: With dead ends: 625 [2021-01-06 16:41:26,078 INFO L226 Difference]: Without dead ends: 530 [2021-01-06 16:41:26,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:41:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-01-06 16:41:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 240. [2021-01-06 16:41:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2021-01-06 16:41:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 304 transitions. [2021-01-06 16:41:26,135 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 304 transitions. Word has length 46 [2021-01-06 16:41:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:26,136 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 304 transitions. [2021-01-06 16:41:26,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:41:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 304 transitions. [2021-01-06 16:41:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:41:26,137 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:26,137 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:26,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:41:26,352 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:26,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2021-01-06 16:41:26,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:26,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919371046] [2021-01-06 16:41:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 16:41:26,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919371046] [2021-01-06 16:41:26,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513108909] [2021-01-06 16:41:26,722 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:41:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:27,105 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:41:27,106 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:27,112 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:27,114 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:27,114 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-01-06 16:41:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:28,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:28,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 20] total 27 [2021-01-06 16:41:28,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139108520] [2021-01-06 16:41:28,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:41:28,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:41:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:41:28,010 INFO L87 Difference]: Start difference. First operand 240 states and 304 transitions. Second operand 27 states. [2021-01-06 16:41:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:39,378 INFO L93 Difference]: Finished difference Result 1400 states and 1820 transitions. [2021-01-06 16:41:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-01-06 16:41:39,379 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2021-01-06 16:41:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:39,387 INFO L225 Difference]: With dead ends: 1400 [2021-01-06 16:41:39,387 INFO L226 Difference]: Without dead ends: 1353 [2021-01-06 16:41:39,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7050 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1960, Invalid=18346, Unknown=0, NotChecked=0, Total=20306 [2021-01-06 16:41:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-01-06 16:41:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 290. [2021-01-06 16:41:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2021-01-06 16:41:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 359 transitions. [2021-01-06 16:41:39,479 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 359 transitions. Word has length 46 [2021-01-06 16:41:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:39,479 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 359 transitions. [2021-01-06 16:41:39,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:41:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 359 transitions. [2021-01-06 16:41:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:41:39,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:39,481 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:39,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:41:39,695 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:39,696 INFO L82 PathProgramCache]: Analyzing trace with hash 152494492, now seen corresponding path program 1 times [2021-01-06 16:41:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:39,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902289137] [2021-01-06 16:41:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 16:41:40,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902289137] [2021-01-06 16:41:40,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568798055] [2021-01-06 16:41:40,425 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:41:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:40,606 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 16:41:40,610 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,628 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:40,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 16:41:40,657 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:41:40,658 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,668 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:40,669 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:14 [2021-01-06 16:41:40,700 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:41:40,701 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,711 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:40,716 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,716 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:14 [2021-01-06 16:41:40,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:41:40,747 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,756 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:40,758 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-01-06 16:41:40,786 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:41:40,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:40,798 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,798 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2021-01-06 16:41:40,809 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:41:40,812 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,821 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:40,823 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:40,825 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2021-01-06 16:41:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:41:41,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:41,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 28 [2021-01-06 16:41:41,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398427690] [2021-01-06 16:41:41,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:41:41,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:41:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:41:41,721 INFO L87 Difference]: Start difference. First operand 290 states and 359 transitions. Second operand 28 states. [2021-01-06 16:41:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:45,244 INFO L93 Difference]: Finished difference Result 1361 states and 1730 transitions. [2021-01-06 16:41:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:41:45,244 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2021-01-06 16:41:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:45,250 INFO L225 Difference]: With dead ends: 1361 [2021-01-06 16:41:45,251 INFO L226 Difference]: Without dead ends: 1256 [2021-01-06 16:41:45,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=573, Invalid=3209, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:41:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-01-06 16:41:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 371. [2021-01-06 16:41:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2021-01-06 16:41:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 456 transitions. [2021-01-06 16:41:45,356 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 456 transitions. Word has length 46 [2021-01-06 16:41:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:45,357 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 456 transitions. [2021-01-06 16:41:45,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:41:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 456 transitions. [2021-01-06 16:41:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:41:45,358 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:45,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:45,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:45,566 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:45,567 INFO L82 PathProgramCache]: Analyzing trace with hash -239684452, now seen corresponding path program 1 times [2021-01-06 16:41:45,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:45,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746519566] [2021-01-06 16:41:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 16:41:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746519566] [2021-01-06 16:41:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7494883] [2021-01-06 16:41:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:41:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:46,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:41:46,473 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:46,483 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:46,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:46,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-01-06 16:41:47,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:41:47,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:41:47,227 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-01-06 16:41:47,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 25 [2021-01-06 16:41:47,230 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:47,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:47,246 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:47,246 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:4 [2021-01-06 16:41:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:41:47,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:47,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 25 [2021-01-06 16:41:47,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490407484] [2021-01-06 16:41:47,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:41:47,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:47,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:41:47,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:41:47,289 INFO L87 Difference]: Start difference. First operand 371 states and 456 transitions. Second operand 25 states. [2021-01-06 16:41:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:51,322 INFO L93 Difference]: Finished difference Result 1833 states and 2336 transitions. [2021-01-06 16:41:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:41:51,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2021-01-06 16:41:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:51,331 INFO L225 Difference]: With dead ends: 1833 [2021-01-06 16:41:51,331 INFO L226 Difference]: Without dead ends: 1775 [2021-01-06 16:41:51,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:41:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-01-06 16:41:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 381. [2021-01-06 16:41:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2021-01-06 16:41:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 462 transitions. [2021-01-06 16:41:51,456 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 462 transitions. Word has length 46 [2021-01-06 16:41:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:51,456 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 462 transitions. [2021-01-06 16:41:51,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:41:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 462 transitions. [2021-01-06 16:41:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:41:51,457 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:51,457 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:51,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:41:51,673 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:51,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756109, now seen corresponding path program 2 times [2021-01-06 16:41:51,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:51,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119414662] [2021-01-06 16:41:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 16:41:51,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119414662] [2021-01-06 16:41:51,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703714806] [2021-01-06 16:41:51,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:51,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:51,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:51,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:41:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:52,050 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-01-06 16:41:52,052 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:52,054 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:52,054 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:52,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2021-01-06 16:41:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 16:41:52,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:52,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-01-06 16:41:52,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688587598] [2021-01-06 16:41:52,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:41:52,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:41:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:41:52,082 INFO L87 Difference]: Start difference. First operand 381 states and 462 transitions. Second operand 17 states. [2021-01-06 16:41:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:52,993 INFO L93 Difference]: Finished difference Result 1239 states and 1561 transitions. [2021-01-06 16:41:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:41:52,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2021-01-06 16:41:52,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:52,999 INFO L225 Difference]: With dead ends: 1239 [2021-01-06 16:41:52,999 INFO L226 Difference]: Without dead ends: 1141 [2021-01-06 16:41:53,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:41:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-01-06 16:41:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 476. [2021-01-06 16:41:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2021-01-06 16:41:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 584 transitions. [2021-01-06 16:41:53,120 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 584 transitions. Word has length 48 [2021-01-06 16:41:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:53,120 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 584 transitions. [2021-01-06 16:41:53,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:41:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 584 transitions. [2021-01-06 16:41:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:41:53,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:53,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:53,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:41:53,338 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2073758376, now seen corresponding path program 3 times [2021-01-06 16:41:53,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:53,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566264736] [2021-01-06 16:41:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:41:53,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566264736] [2021-01-06 16:41:53,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507943666] [2021-01-06 16:41:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:53,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:41:53,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:41:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:54,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:41:54,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:41:54,262 INFO L348 Elim1Store]: treesize reduction 8, result has 88.9 percent of original size [2021-01-06 16:41:54,263 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 47 treesize of output 78 [2021-01-06 16:41:54,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:41:54,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:41:54,269 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:54,314 INFO L625 ElimStorePlain]: treesize reduction 18, result has 62.5 percent of original size [2021-01-06 16:41:54,317 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:54,317 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:14 [2021-01-06 16:41:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 16:41:54,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:54,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16] total 19 [2021-01-06 16:41:54,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878230497] [2021-01-06 16:41:54,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:41:54,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:54,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:41:54,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:41:54,377 INFO L87 Difference]: Start difference. First operand 476 states and 584 transitions. Second operand 19 states. [2021-01-06 16:41:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:56,228 INFO L93 Difference]: Finished difference Result 832 states and 1015 transitions. [2021-01-06 16:41:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:41:56,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2021-01-06 16:41:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:56,232 INFO L225 Difference]: With dead ends: 832 [2021-01-06 16:41:56,232 INFO L226 Difference]: Without dead ends: 464 [2021-01-06 16:41:56,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:41:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-01-06 16:41:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 338. [2021-01-06 16:41:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2021-01-06 16:41:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 392 transitions. [2021-01-06 16:41:56,330 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 392 transitions. Word has length 52 [2021-01-06 16:41:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:56,331 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 392 transitions. [2021-01-06 16:41:56,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:41:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 392 transitions. [2021-01-06 16:41:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:41:56,332 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:56,332 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:56,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:56,546 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:56,547 INFO L82 PathProgramCache]: Analyzing trace with hash -723438098, now seen corresponding path program 1 times [2021-01-06 16:41:56,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:56,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577100749] [2021-01-06 16:41:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:41:57,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577100749] [2021-01-06 16:41:57,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831382868] [2021-01-06 16:41:57,029 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:57,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:41:57,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:57,284 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 16:41:57,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:57,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:57,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:57,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2021-01-06 16:41:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:41:57,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:57,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-01-06 16:41:57,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243597748] [2021-01-06 16:41:57,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:41:57,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:41:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:41:57,318 INFO L87 Difference]: Start difference. First operand 338 states and 392 transitions. Second operand 18 states. [2021-01-06 16:41:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:57,844 INFO L93 Difference]: Finished difference Result 401 states and 459 transitions. [2021-01-06 16:41:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:41:57,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2021-01-06 16:41:57,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:57,846 INFO L225 Difference]: With dead ends: 401 [2021-01-06 16:41:57,846 INFO L226 Difference]: Without dead ends: 326 [2021-01-06 16:41:57,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:41:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-01-06 16:41:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 311. [2021-01-06 16:41:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2021-01-06 16:41:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 362 transitions. [2021-01-06 16:41:57,945 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 362 transitions. Word has length 56 [2021-01-06 16:41:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:57,946 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 362 transitions. [2021-01-06 16:41:57,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:41:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 362 transitions. [2021-01-06 16:41:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:41:57,947 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:57,947 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:58,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:58,161 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:58,164 INFO L82 PathProgramCache]: Analyzing trace with hash 164444132, now seen corresponding path program 2 times [2021-01-06 16:41:58,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:58,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852136759] [2021-01-06 16:41:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 16:41:58,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852136759] [2021-01-06 16:41:58,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291877109] [2021-01-06 16:41:58,311 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:58,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:58,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:41:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:58,676 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-01-06 16:41:58,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:41:58,679 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:41:58,680 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:41:58,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2021-01-06 16:41:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:41:58,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:58,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-01-06 16:41:58,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973324501] [2021-01-06 16:41:58,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:41:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:41:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:41:58,721 INFO L87 Difference]: Start difference. First operand 311 states and 362 transitions. Second operand 21 states. [2021-01-06 16:41:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:59,992 INFO L93 Difference]: Finished difference Result 1496 states and 1753 transitions. [2021-01-06 16:41:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:41:59,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2021-01-06 16:41:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:59,997 INFO L225 Difference]: With dead ends: 1496 [2021-01-06 16:41:59,997 INFO L226 Difference]: Without dead ends: 1401 [2021-01-06 16:41:59,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:42:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-01-06 16:42:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 602. [2021-01-06 16:42:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2021-01-06 16:42:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 700 transitions. [2021-01-06 16:42:00,166 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 700 transitions. Word has length 60 [2021-01-06 16:42:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:00,167 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 700 transitions. [2021-01-06 16:42:00,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:42:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 700 transitions. [2021-01-06 16:42:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 16:42:00,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:00,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:00,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:00,383 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:00,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:00,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 3 times [2021-01-06 16:42:00,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:00,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169268879] [2021-01-06 16:42:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 16:42:01,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169268879] [2021-01-06 16:42:01,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161233917] [2021-01-06 16:42:01,590 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:01,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:42:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:42:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:02,965 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:02,965 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 21 [2021-01-06 16:42:02,967 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:02,969 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:02,970 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:02,970 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-01-06 16:42:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 16:42:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 35 [2021-01-06 16:42:03,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999429063] [2021-01-06 16:42:03,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:42:03,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:42:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:42:03,040 INFO L87 Difference]: Start difference. First operand 602 states and 700 transitions. Second operand 35 states. [2021-01-06 16:42:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:08,945 INFO L93 Difference]: Finished difference Result 2360 states and 2749 transitions. [2021-01-06 16:42:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:42:08,945 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2021-01-06 16:42:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:08,952 INFO L225 Difference]: With dead ends: 2360 [2021-01-06 16:42:08,953 INFO L226 Difference]: Without dead ends: 2158 [2021-01-06 16:42:08,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1194, Invalid=6462, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:42:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-01-06 16:42:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 871. [2021-01-06 16:42:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2021-01-06 16:42:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1009 transitions. [2021-01-06 16:42:09,283 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1009 transitions. Word has length 67 [2021-01-06 16:42:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:09,283 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1009 transitions. [2021-01-06 16:42:09,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:42:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1009 transitions. [2021-01-06 16:42:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 16:42:09,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:09,286 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:09,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:42:09,500 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:09,501 INFO L82 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 4 times [2021-01-06 16:42:09,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:09,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353861939] [2021-01-06 16:42:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:10,392 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-01-06 16:42:10,536 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-01-06 16:42:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 16:42:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353861939] [2021-01-06 16:42:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153742232] [2021-01-06 16:42:11,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:11,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:42:11,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:11,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:42:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:11,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:42:11,797 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-01-06 16:42:11,798 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 21 [2021-01-06 16:42:11,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:11,805 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:11,807 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:11,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2021-01-06 16:42:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 16:42:11,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:11,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 30 [2021-01-06 16:42:11,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030430055] [2021-01-06 16:42:11,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:42:11,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:11,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:42:11,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:42:11,860 INFO L87 Difference]: Start difference. First operand 871 states and 1009 transitions. Second operand 30 states. [2021-01-06 16:42:12,436 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-01-06 16:42:14,258 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 16:42:14,990 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-01-06 16:42:15,218 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-01-06 16:42:16,939 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-01-06 16:42:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:17,264 INFO L93 Difference]: Finished difference Result 2044 states and 2360 transitions. [2021-01-06 16:42:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:42:17,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2021-01-06 16:42:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:17,273 INFO L225 Difference]: With dead ends: 2044 [2021-01-06 16:42:17,273 INFO L226 Difference]: Without dead ends: 1740 [2021-01-06 16:42:17,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=646, Invalid=3910, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:42:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-01-06 16:42:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1170. [2021-01-06 16:42:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1170 states. [2021-01-06 16:42:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1360 transitions. [2021-01-06 16:42:17,700 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1360 transitions. Word has length 67 [2021-01-06 16:42:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:17,700 INFO L481 AbstractCegarLoop]: Abstraction has 1170 states and 1360 transitions. [2021-01-06 16:42:17,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:42:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1360 transitions. [2021-01-06 16:42:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 16:42:17,703 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:17,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:17,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:42:17,904 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 5 times [2021-01-06 16:42:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:17,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311954440] [2021-01-06 16:42:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 16:42:19,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311954440] [2021-01-06 16:42:19,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616849736] [2021-01-06 16:42:19,066 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:19,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:42:19,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:42:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:42:20,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:20,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-01-06 16:42:20,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902964281] [2021-01-06 16:42:20,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:42:20,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:20,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:42:20,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:42:20,577 INFO L87 Difference]: Start difference. First operand 1170 states and 1360 transitions. Second operand 31 states. [2021-01-06 16:42:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:25,977 INFO L93 Difference]: Finished difference Result 2111 states and 2397 transitions. [2021-01-06 16:42:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:42:25,978 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2021-01-06 16:42:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:25,983 INFO L225 Difference]: With dead ends: 2111 [2021-01-06 16:42:25,983 INFO L226 Difference]: Without dead ends: 1858 [2021-01-06 16:42:25,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=755, Invalid=5407, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:42:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-01-06 16:42:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1290. [2021-01-06 16:42:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2021-01-06 16:42:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1470 transitions. [2021-01-06 16:42:26,497 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1470 transitions. Word has length 67 [2021-01-06 16:42:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:26,498 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1470 transitions. [2021-01-06 16:42:26,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:42:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1470 transitions. [2021-01-06 16:42:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 16:42:26,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:26,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:26,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:26,709 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 6 times [2021-01-06 16:42:26,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:26,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845198535] [2021-01-06 16:42:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 16:42:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845198535] [2021-01-06 16:42:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251042866] [2021-01-06 16:42:28,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:28,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 16:42:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:28,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:42:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:28,831 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:28,831 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-01-06 16:42:28,832 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:28,838 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:28,840 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:28,841 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:4 [2021-01-06 16:42:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 16:42:28,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:28,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 30 [2021-01-06 16:42:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412510331] [2021-01-06 16:42:28,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:42:28,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:42:28,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:42:28,907 INFO L87 Difference]: Start difference. First operand 1290 states and 1470 transitions. Second operand 30 states. [2021-01-06 16:42:29,497 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-01-06 16:42:30,347 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2021-01-06 16:42:30,853 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2021-01-06 16:42:31,514 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-01-06 16:42:32,094 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-01-06 16:42:32,365 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-01-06 16:42:32,586 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-01-06 16:42:32,749 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-01-06 16:42:32,903 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-01-06 16:42:33,540 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-01-06 16:42:34,175 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-01-06 16:42:34,491 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-01-06 16:42:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:34,517 INFO L93 Difference]: Finished difference Result 1854 states and 2093 transitions. [2021-01-06 16:42:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:42:34,518 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2021-01-06 16:42:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:34,523 INFO L225 Difference]: With dead ends: 1854 [2021-01-06 16:42:34,523 INFO L226 Difference]: Without dead ends: 1510 [2021-01-06 16:42:34,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=645, Invalid=3515, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:42:34,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-01-06 16:42:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1104. [2021-01-06 16:42:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2021-01-06 16:42:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1256 transitions. [2021-01-06 16:42:34,840 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1256 transitions. Word has length 67 [2021-01-06 16:42:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:34,840 INFO L481 AbstractCegarLoop]: Abstraction has 1104 states and 1256 transitions. [2021-01-06 16:42:34,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:42:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1256 transitions. [2021-01-06 16:42:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 16:42:34,843 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:34,843 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:42:35,057 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1033890863, now seen corresponding path program 7 times [2021-01-06 16:42:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:35,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654750264] [2021-01-06 16:42:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:42:36,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654750264] [2021-01-06 16:42:36,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244933506] [2021-01-06 16:42:36,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:36,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:42:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:37,099 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:37,099 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-01-06 16:42:37,101 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:37,110 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:37,112 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:37,112 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:27, output treesize:4 [2021-01-06 16:42:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 16:42:37,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:37,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-01-06 16:42:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862189623] [2021-01-06 16:42:37,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:42:37,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:42:37,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:42:37,174 INFO L87 Difference]: Start difference. First operand 1104 states and 1256 transitions. Second operand 33 states. [2021-01-06 16:42:38,201 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-01-06 16:42:38,374 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-01-06 16:42:38,861 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-01-06 16:42:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:40,805 INFO L93 Difference]: Finished difference Result 1827 states and 2052 transitions. [2021-01-06 16:42:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:42:40,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2021-01-06 16:42:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:40,810 INFO L225 Difference]: With dead ends: 1827 [2021-01-06 16:42:40,810 INFO L226 Difference]: Without dead ends: 1475 [2021-01-06 16:42:40,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=505, Invalid=2801, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:42:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-01-06 16:42:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 854. [2021-01-06 16:42:41,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 854 states. [2021-01-06 16:42:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 969 transitions. [2021-01-06 16:42:41,047 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 969 transitions. Word has length 67 [2021-01-06 16:42:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:41,048 INFO L481 AbstractCegarLoop]: Abstraction has 854 states and 969 transitions. [2021-01-06 16:42:41,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:42:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 969 transitions. [2021-01-06 16:42:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:42:41,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:41,050 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:41,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:41,265 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash -563207537, now seen corresponding path program 8 times [2021-01-06 16:42:41,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:41,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790463920] [2021-01-06 16:42:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-01-06 16:42:41,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790463920] [2021-01-06 16:42:41,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505559830] [2021-01-06 16:42:41,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:41,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:42:41,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:42:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:42,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 16:42:42,328 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:42,329 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-01-06 16:42:42,332 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:42,348 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:42,350 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:42,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2021-01-06 16:42:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-01-06 16:42:42,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:42,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-01-06 16:42:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516156833] [2021-01-06 16:42:42,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:42:42,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:42:42,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:42:42,419 INFO L87 Difference]: Start difference. First operand 854 states and 969 transitions. Second operand 22 states. [2021-01-06 16:42:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:44,860 INFO L93 Difference]: Finished difference Result 2325 states and 2624 transitions. [2021-01-06 16:42:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:42:44,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2021-01-06 16:42:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:44,867 INFO L225 Difference]: With dead ends: 2325 [2021-01-06 16:42:44,868 INFO L226 Difference]: Without dead ends: 2233 [2021-01-06 16:42:44,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:42:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-01-06 16:42:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 823. [2021-01-06 16:42:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2021-01-06 16:42:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 933 transitions. [2021-01-06 16:42:45,091 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 933 transitions. Word has length 72 [2021-01-06 16:42:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:45,092 INFO L481 AbstractCegarLoop]: Abstraction has 823 states and 933 transitions. [2021-01-06 16:42:45,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:42:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 933 transitions. [2021-01-06 16:42:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 16:42:45,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:45,094 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:45,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:42:45,300 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash -100514461, now seen corresponding path program 9 times [2021-01-06 16:42:45,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:45,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391568753] [2021-01-06 16:42:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 16:42:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391568753] [2021-01-06 16:42:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823990294] [2021-01-06 16:42:45,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:46,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 16:42:46,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:46,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:42:46,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:46,532 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:42:46,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:46,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:46,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:46,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 16:42:46,546 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:42:46,547 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:42:46,555 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:42:46,556 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:42:46,556 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-01-06 16:42:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-01-06 16:42:47,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:47,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-01-06 16:42:47,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377319912] [2021-01-06 16:42:47,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:42:47,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:42:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:42:47,102 INFO L87 Difference]: Start difference. First operand 823 states and 933 transitions. Second operand 26 states. [2021-01-06 16:42:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:48,174 INFO L93 Difference]: Finished difference Result 978 states and 1092 transitions. [2021-01-06 16:42:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:42:48,175 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2021-01-06 16:42:48,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:48,178 INFO L225 Difference]: With dead ends: 978 [2021-01-06 16:42:48,178 INFO L226 Difference]: Without dead ends: 774 [2021-01-06 16:42:48,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:42:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-01-06 16:42:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 741. [2021-01-06 16:42:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2021-01-06 16:42:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 842 transitions. [2021-01-06 16:42:48,374 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 842 transitions. Word has length 77 [2021-01-06 16:42:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:48,374 INFO L481 AbstractCegarLoop]: Abstraction has 741 states and 842 transitions. [2021-01-06 16:42:48,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:42:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 842 transitions. [2021-01-06 16:42:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 16:42:48,377 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:48,377 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:48,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:42:48,591 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:48,592 INFO L82 PathProgramCache]: Analyzing trace with hash 449984813, now seen corresponding path program 10 times [2021-01-06 16:42:48,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:48,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067128257] [2021-01-06 16:42:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-01-06 16:42:48,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067128257] [2021-01-06 16:42:48,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107714174] [2021-01-06 16:42:48,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:49,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:42:49,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:42:49,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 46 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:42:53,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:53,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-01-06 16:42:53,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415852871] [2021-01-06 16:42:53,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:42:53,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:53,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:42:53,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=606, Unknown=4, NotChecked=0, Total=702 [2021-01-06 16:42:53,196 INFO L87 Difference]: Start difference. First operand 741 states and 842 transitions. Second operand 27 states. [2021-01-06 16:43:03,494 WARN L197 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 16:43:07,216 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 16:43:15,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:15,060 INFO L93 Difference]: Finished difference Result 2731 states and 3097 transitions. [2021-01-06 16:43:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:43:15,061 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 81 [2021-01-06 16:43:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:15,068 INFO L225 Difference]: With dead ends: 2731 [2021-01-06 16:43:15,068 INFO L226 Difference]: Without dead ends: 2519 [2021-01-06 16:43:15,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=274, Invalid=2366, Unknown=12, NotChecked=0, Total=2652 [2021-01-06 16:43:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-01-06 16:43:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 693. [2021-01-06 16:43:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2021-01-06 16:43:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 785 transitions. [2021-01-06 16:43:15,258 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 785 transitions. Word has length 81 [2021-01-06 16:43:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:15,258 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 785 transitions. [2021-01-06 16:43:15,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:43:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 785 transitions. [2021-01-06 16:43:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:43:15,260 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:15,260 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:15,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:43:15,469 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:15,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1839805964, now seen corresponding path program 11 times [2021-01-06 16:43:15,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:15,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935024424] [2021-01-06 16:43:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-01-06 16:43:15,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935024424] [2021-01-06 16:43:15,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551343405] [2021-01-06 16:43:15,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:17,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 16:43:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:43:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:18,102 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:43:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-01-06 16:43:18,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:18,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-01-06 16:43:18,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862972348] [2021-01-06 16:43:18,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:43:18,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:18,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:43:18,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:43:18,158 INFO L87 Difference]: Start difference. First operand 693 states and 785 transitions. Second operand 15 states. [2021-01-06 16:43:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:19,097 INFO L93 Difference]: Finished difference Result 1177 states and 1316 transitions. [2021-01-06 16:43:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:43:19,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 88 [2021-01-06 16:43:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:19,102 INFO L225 Difference]: With dead ends: 1177 [2021-01-06 16:43:19,102 INFO L226 Difference]: Without dead ends: 1173 [2021-01-06 16:43:19,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:43:19,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-01-06 16:43:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 909. [2021-01-06 16:43:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 909 states. [2021-01-06 16:43:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1031 transitions. [2021-01-06 16:43:19,522 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1031 transitions. Word has length 88 [2021-01-06 16:43:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:19,522 INFO L481 AbstractCegarLoop]: Abstraction has 909 states and 1031 transitions. [2021-01-06 16:43:19,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:43:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1031 transitions. [2021-01-06 16:43:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:43:19,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:19,524 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:19,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:19,728 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1581640526, now seen corresponding path program 12 times [2021-01-06 16:43:19,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:19,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341551742] [2021-01-06 16:43:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 16:43:21,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341551742] [2021-01-06 16:43:21,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349504726] [2021-01-06 16:43:21,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:21,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 16:43:21,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:43:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:21,527 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 16:43:21,529 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:43:21,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:43:21,546 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 16:43:21,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:32 [2021-01-06 16:43:21,653 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:43:21,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 90 [2021-01-06 16:43:21,657 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:43:21,730 INFO L625 ElimStorePlain]: treesize reduction 33, result has 63.3 percent of original size [2021-01-06 16:43:21,734 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:43:21,734 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:23 [2021-01-06 16:43:21,839 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-01-06 16:43:21,840 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:43:21,882 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:43:21,884 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:43:21,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:23 [2021-01-06 16:43:21,943 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-01-06 16:43:21,945 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:43:21,959 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:43:21,960 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:43:21,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:20 [2021-01-06 16:43:22,016 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-01-06 16:43:22,018 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:43:22,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:43:22,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:43:22,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:20 [2021-01-06 16:43:22,046 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-01-06 16:43:22,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:43:22,065 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:43:22,067 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:43:22,068 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-01-06 16:44:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 16:44:02,472 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:44:02,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-01-06 16:44:02,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:44:02,501 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:44:02,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:44:02,507 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:44:02,507 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:3 [2021-01-06 16:44:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 137 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 16:44:02,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:02,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 47 [2021-01-06 16:44:02,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247324764] [2021-01-06 16:44:02,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:44:02,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:02,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:44:02,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1871, Unknown=20, NotChecked=0, Total=2162 [2021-01-06 16:44:02,660 INFO L87 Difference]: Start difference. First operand 909 states and 1031 transitions. Second operand 47 states. [2021-01-06 16:44:04,726 WARN L197 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-01-06 16:44:05,713 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-01-06 16:44:06,334 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-01-06 16:44:47,231 WARN L197 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-01-06 16:44:54,714 WARN L197 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-01-06 16:45:03,722 WARN L197 SmtUtils]: Spent 4.92 s on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-01-06 16:45:10,875 WARN L197 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 61 DAG size of output: 52