/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:16:54,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:16:54,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:16:54,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:16:54,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:16:54,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:16:54,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:16:54,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:16:54,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:16:54,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:16:54,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:16:54,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:16:54,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:16:54,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:16:54,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:16:54,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:16:54,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:16:54,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:16:54,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:16:54,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:16:54,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:16:54,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:16:54,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:16:54,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:16:54,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:16:54,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:16:54,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:16:54,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:16:54,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:16:54,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:16:54,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:16:54,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:16:54,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:16:54,611 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:16:54,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:16:54,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:16:54,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:16:54,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:16:54,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:16:54,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:16:54,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:16:54,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:16:54,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:16:54,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:16:54,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:16:54,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:16:54,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:16:54,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:16:54,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:16:54,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:16:54,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:16:54,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:16:54,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:16:54,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:16:54,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:16:55,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:16:55,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:16:55,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:16:55,092 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:16:55,093 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:16:55,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2020-12-23 00:16:55,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9deeaeea6/49ddebb1da8d4534bfdb22cbc4aac01e/FLAG12913a960 [2020-12-23 00:16:55,818 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:16:55,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2020-12-23 00:16:55,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9deeaeea6/49ddebb1da8d4534bfdb22cbc4aac01e/FLAG12913a960 [2020-12-23 00:16:56,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9deeaeea6/49ddebb1da8d4534bfdb22cbc4aac01e [2020-12-23 00:16:56,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:16:56,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:16:56,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:16:56,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:16:56,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:16:56,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:16:56" (1/1) ... [2020-12-23 00:16:56,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b79410e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:56, skipping insertion in model container [2020-12-23 00:16:56,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:16:56" (1/1) ... [2020-12-23 00:16:56,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:16:56,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:16:56,375 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]],n] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~a~0,GLOBAL],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]],n] [2020-12-23 00:16:56,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:16:58,652 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:16:58,669 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]]]] [2020-12-23 00:16:58,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:16:58,705 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:16:58,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58 WrapperNode [2020-12-23 00:16:58,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:16:58,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:16:58,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:16:58,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:16:58,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:16:58,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:16:58,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:16:58,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:16:58,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... [2020-12-23 00:16:58,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:16:58,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:16:58,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:16:58,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:16:58,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:16:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:16:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:16:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:16:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:16:58,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:16:58,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:16:59,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:16:59,190 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:16:59,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:16:59 BoogieIcfgContainer [2020-12-23 00:16:59,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:16:59,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:16:59,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:16:59,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:16:59,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:16:56" (1/3) ... [2020-12-23 00:16:59,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32646738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:16:59, skipping insertion in model container [2020-12-23 00:16:59,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:16:58" (2/3) ... [2020-12-23 00:16:59,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32646738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:16:59, skipping insertion in model container [2020-12-23 00:16:59,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:16:59" (3/3) ... [2020-12-23 00:16:59,206 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2020-12-23 00:16:59,216 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:16:59,223 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:16:59,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:16:59,277 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:16:59,277 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:16:59,278 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:16:59,278 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:16:59,278 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:16:59,278 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:16:59,279 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:16:59,279 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:16:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 00:16:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 00:16:59,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:59,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:59,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:59,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2020-12-23 00:16:59,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:59,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103137411] [2020-12-23 00:16:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:16:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103137411] [2020-12-23 00:16:59,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:16:59,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:16:59,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233916066] [2020-12-23 00:16:59,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:16:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:16:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:16:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:16:59,637 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-12-23 00:16:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:16:59,723 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2020-12-23 00:16:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:16:59,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 00:16:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:16:59,737 INFO L225 Difference]: With dead ends: 37 [2020-12-23 00:16:59,737 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 00:16:59,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:16:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 00:16:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-23 00:16:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:16:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-23 00:16:59,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2020-12-23 00:16:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:16:59,818 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-23 00:16:59,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:16:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-23 00:16:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:16:59,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:16:59,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:16:59,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:16:59,820 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:16:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:16:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2020-12-23 00:16:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:16:59,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502350704] [2020-12-23 00:16:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:16:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:16:59,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502350704] [2020-12-23 00:16:59,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961708703] [2020-12-23 00:16:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:16:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:16:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:16:59,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:00,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:00,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:17:00,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060699985] [2020-12-23 00:17:00,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:17:00,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:17:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:00,068 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-23 00:17:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:00,128 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-23 00:17:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:17:00,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 00:17:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:00,130 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:17:00,130 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:17:00,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:17:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:17:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-12-23 00:17:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:17:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:17:00,138 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-12-23 00:17:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:00,138 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:17:00,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:17:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:17:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:17:00,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:00,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:00,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:17:00,354 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:00,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2020-12-23 00:17:00,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:00,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095497744] [2020-12-23 00:17:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:00,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095497744] [2020-12-23 00:17:00,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950984503] [2020-12-23 00:17:00,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:00,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:17:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:00,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:00,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:17:00,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220580400] [2020-12-23 00:17:00,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:17:00,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:00,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:17:00,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:00,499 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-12-23 00:17:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:00,551 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-23 00:17:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:17:00,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 00:17:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:00,552 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:17:00,552 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:17:00,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:17:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:17:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-12-23 00:17:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:17:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 00:17:00,563 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2020-12-23 00:17:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:00,564 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 00:17:00,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:17:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 00:17:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:17:00,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:00,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:00,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:00,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:00,783 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2020-12-23 00:17:00,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:00,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332103796] [2020-12-23 00:17:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:00,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332103796] [2020-12-23 00:17:00,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101274959] [2020-12-23 00:17:00,885 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:00,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:17:00,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:17:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:01,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:01,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:17:01,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303843704] [2020-12-23 00:17:01,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:17:01,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:17:01,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:01,034 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2020-12-23 00:17:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:01,091 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-12-23 00:17:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:17:01,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 00:17:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:01,093 INFO L225 Difference]: With dead ends: 70 [2020-12-23 00:17:01,093 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 00:17:01,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:17:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 00:17:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-12-23 00:17:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:17:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-23 00:17:01,100 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2020-12-23 00:17:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:01,101 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-23 00:17:01,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:17:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-23 00:17:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:17:01,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:01,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:01,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:01,318 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2020-12-23 00:17:01,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:01,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539406012] [2020-12-23 00:17:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:01,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539406012] [2020-12-23 00:17:01,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185136507] [2020-12-23 00:17:01,454 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:01,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:01,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:17:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:01,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:01,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:17:01,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068752689] [2020-12-23 00:17:01,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:17:01,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:17:01,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:01,539 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-12-23 00:17:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:01,668 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-12-23 00:17:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:17:01,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-23 00:17:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:01,670 INFO L225 Difference]: With dead ends: 84 [2020-12-23 00:17:01,670 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:17:01,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:17:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:17:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-12-23 00:17:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:17:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-23 00:17:01,678 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 15 [2020-12-23 00:17:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:01,679 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-23 00:17:01,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:17:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-23 00:17:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:17:01,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:01,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:01,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:01,895 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2020-12-23 00:17:01,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:01,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455518692] [2020-12-23 00:17:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455518692] [2020-12-23 00:17:02,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023488230] [2020-12-23 00:17:02,003 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:02,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:17:02,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:02,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:17:02,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:02,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:02,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:17:02,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006103720] [2020-12-23 00:17:02,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:17:02,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:02,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:17:02,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:02,104 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 9 states. [2020-12-23 00:17:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:02,187 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-12-23 00:17:02,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:17:02,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 00:17:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:02,189 INFO L225 Difference]: With dead ends: 98 [2020-12-23 00:17:02,189 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:17:02,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:17:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:17:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2020-12-23 00:17:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:17:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-23 00:17:02,198 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 17 [2020-12-23 00:17:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:02,198 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-23 00:17:02,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:17:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-23 00:17:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:17:02,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:02,199 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:02,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:17:02,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:02,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:02,414 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2020-12-23 00:17:02,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:02,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726195454] [2020-12-23 00:17:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:02,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726195454] [2020-12-23 00:17:02,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788340566] [2020-12-23 00:17:02,536 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:02,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:17:02,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:17:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:02,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:02,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:17:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486965002] [2020-12-23 00:17:02,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:17:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:17:02,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:02,645 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2020-12-23 00:17:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:02,736 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-12-23 00:17:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:17:02,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 00:17:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:02,738 INFO L225 Difference]: With dead ends: 112 [2020-12-23 00:17:02,738 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 00:17:02,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:17:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 00:17:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-12-23 00:17:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:17:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-12-23 00:17:02,746 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 19 [2020-12-23 00:17:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:02,747 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-12-23 00:17:02,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:17:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-12-23 00:17:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:17:02,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:02,748 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:02,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:02,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2020-12-23 00:17:02,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:02,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769444640] [2020-12-23 00:17:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:03,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769444640] [2020-12-23 00:17:03,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036474147] [2020-12-23 00:17:03,060 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:03,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:17:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:03,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:03,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:17:03,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600538805] [2020-12-23 00:17:03,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:17:03,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:03,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:17:03,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:03,164 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2020-12-23 00:17:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:03,267 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-12-23 00:17:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:17:03,267 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-23 00:17:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:03,268 INFO L225 Difference]: With dead ends: 126 [2020-12-23 00:17:03,269 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 00:17:03,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:17:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 00:17:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-12-23 00:17:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 00:17:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-12-23 00:17:03,278 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 21 [2020-12-23 00:17:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:03,278 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-12-23 00:17:03,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:17:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-12-23 00:17:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:17:03,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:03,280 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:03,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:03,490 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:03,491 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2020-12-23 00:17:03,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:03,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594949669] [2020-12-23 00:17:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:03,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594949669] [2020-12-23 00:17:03,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101830441] [2020-12-23 00:17:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:03,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:03,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:03,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:17:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:03,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:03,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:17:03,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344698078] [2020-12-23 00:17:03,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:17:03,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:03,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:17:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:03,788 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2020-12-23 00:17:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:03,901 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2020-12-23 00:17:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:17:03,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-23 00:17:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:03,902 INFO L225 Difference]: With dead ends: 140 [2020-12-23 00:17:03,903 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:17:03,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:17:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:17:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-12-23 00:17:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:17:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-12-23 00:17:03,911 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 23 [2020-12-23 00:17:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:03,912 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-12-23 00:17:03,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:17:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-12-23 00:17:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:17:03,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:03,913 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:04,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:17:04,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2020-12-23 00:17:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:04,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653963702] [2020-12-23 00:17:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:04,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653963702] [2020-12-23 00:17:04,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401387886] [2020-12-23 00:17:04,252 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:04,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:17:04,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:17:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:04,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:04,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:17:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521906712] [2020-12-23 00:17:04,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:17:04,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:04,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:17:04,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:17:04,427 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 13 states. [2020-12-23 00:17:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:04,547 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-23 00:17:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:17:04,547 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-23 00:17:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:04,548 INFO L225 Difference]: With dead ends: 154 [2020-12-23 00:17:04,549 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:17:04,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:17:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:17:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2020-12-23 00:17:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:17:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-12-23 00:17:04,557 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2020-12-23 00:17:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:04,558 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-12-23 00:17:04,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:17:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-12-23 00:17:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:17:04,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:04,559 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:04,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:04,774 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2020-12-23 00:17:04,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:04,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2508711] [2020-12-23 00:17:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2508711] [2020-12-23 00:17:04,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951237925] [2020-12-23 00:17:04,964 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:05,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:05,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:05,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:17:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:05,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:05,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:17:05,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507822667] [2020-12-23 00:17:05,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:17:05,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:05,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:17:05,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:17:05,130 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 14 states. [2020-12-23 00:17:05,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:05,266 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2020-12-23 00:17:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:17:05,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-12-23 00:17:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:05,268 INFO L225 Difference]: With dead ends: 168 [2020-12-23 00:17:05,268 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 00:17:05,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:17:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 00:17:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-12-23 00:17:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:17:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-12-23 00:17:05,276 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2020-12-23 00:17:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:05,277 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-12-23 00:17:05,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:17:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-12-23 00:17:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:17:05,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:05,278 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:05,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:05,492 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2020-12-23 00:17:05,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:05,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813428122] [2020-12-23 00:17:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:05,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813428122] [2020-12-23 00:17:05,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787168749] [2020-12-23 00:17:05,674 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:05,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:17:05,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:17:05,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:05,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:05,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:17:05,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636945114] [2020-12-23 00:17:05,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:17:05,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:05,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:17:05,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:17:05,877 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 15 states. [2020-12-23 00:17:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:06,036 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2020-12-23 00:17:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:17:06,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-23 00:17:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:06,041 INFO L225 Difference]: With dead ends: 182 [2020-12-23 00:17:06,041 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 00:17:06,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:17:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 00:17:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2020-12-23 00:17:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 00:17:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-12-23 00:17:06,068 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 29 [2020-12-23 00:17:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:06,070 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-12-23 00:17:06,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:17:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-12-23 00:17:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:17:06,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:06,072 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:06,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:17:06,273 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:06,274 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2020-12-23 00:17:06,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:06,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326295042] [2020-12-23 00:17:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:06,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326295042] [2020-12-23 00:17:06,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343589700] [2020-12-23 00:17:06,466 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:06,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:17:06,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:17:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:06,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:06,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:17:06,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303435689] [2020-12-23 00:17:06,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:17:06,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:17:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:17:06,813 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 16 states. [2020-12-23 00:17:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:06,985 INFO L93 Difference]: Finished difference Result 196 states and 213 transitions. [2020-12-23 00:17:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:17:06,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-23 00:17:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:06,988 INFO L225 Difference]: With dead ends: 196 [2020-12-23 00:17:06,988 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 00:17:06,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:17:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 00:17:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-12-23 00:17:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 00:17:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-12-23 00:17:06,996 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 31 [2020-12-23 00:17:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:06,996 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-12-23 00:17:06,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:17:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-12-23 00:17:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:17:06,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:06,998 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:07,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:17:07,213 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:07,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2020-12-23 00:17:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:07,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950595755] [2020-12-23 00:17:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:07,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950595755] [2020-12-23 00:17:07,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889697985] [2020-12-23 00:17:07,444 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:07,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:17:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:07,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:07,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:17:07,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234302231] [2020-12-23 00:17:07,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:17:07,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:17:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:17:07,565 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 17 states. [2020-12-23 00:17:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:07,695 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2020-12-23 00:17:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:17:07,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-12-23 00:17:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:07,697 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:17:07,698 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:17:07,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:17:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:17:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2020-12-23 00:17:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:17:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-12-23 00:17:07,705 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 33 [2020-12-23 00:17:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:07,705 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-12-23 00:17:07,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:17:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-12-23 00:17:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:17:07,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:07,706 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:07,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:17:07,920 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:07,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2020-12-23 00:17:07,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:07,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705773808] [2020-12-23 00:17:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705773808] [2020-12-23 00:17:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914226386] [2020-12-23 00:17:08,102 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:08,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:08,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:08,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:17:08,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:08,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:08,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:17:08,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355309269] [2020-12-23 00:17:08,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:17:08,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:17:08,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:17:08,222 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 18 states. [2020-12-23 00:17:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:08,404 INFO L93 Difference]: Finished difference Result 224 states and 243 transitions. [2020-12-23 00:17:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:17:08,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-12-23 00:17:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:08,407 INFO L225 Difference]: With dead ends: 224 [2020-12-23 00:17:08,407 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 00:17:08,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:17:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 00:17:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-12-23 00:17:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 00:17:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2020-12-23 00:17:08,413 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 35 [2020-12-23 00:17:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:08,414 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2020-12-23 00:17:08,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:17:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2020-12-23 00:17:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:17:08,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:08,415 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:08,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:08,628 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2020-12-23 00:17:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:08,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155550045] [2020-12-23 00:17:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:08,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155550045] [2020-12-23 00:17:08,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356635395] [2020-12-23 00:17:08,853 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:09,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 00:17:09,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:09,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:17:09,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:09,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:09,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:17:09,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137393843] [2020-12-23 00:17:09,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:17:09,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:09,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:17:09,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:17:09,218 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand 19 states. [2020-12-23 00:17:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:09,393 INFO L93 Difference]: Finished difference Result 238 states and 258 transitions. [2020-12-23 00:17:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:17:09,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-12-23 00:17:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:09,395 INFO L225 Difference]: With dead ends: 238 [2020-12-23 00:17:09,396 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 00:17:09,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:17:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 00:17:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2020-12-23 00:17:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 00:17:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2020-12-23 00:17:09,402 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 37 [2020-12-23 00:17:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:09,402 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2020-12-23 00:17:09,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:17:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2020-12-23 00:17:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:17:09,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:09,404 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:09,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:17:09,619 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:09,620 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2020-12-23 00:17:09,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:09,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255351239] [2020-12-23 00:17:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:09,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255351239] [2020-12-23 00:17:09,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740362202] [2020-12-23 00:17:09,869 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:09,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:17:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:10,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:10,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:17:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652430199] [2020-12-23 00:17:10,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:17:10,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:17:10,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:17:10,039 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand 20 states. [2020-12-23 00:17:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:10,226 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2020-12-23 00:17:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:17:10,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-12-23 00:17:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:10,232 INFO L225 Difference]: With dead ends: 252 [2020-12-23 00:17:10,232 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 00:17:10,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:17:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 00:17:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 129. [2020-12-23 00:17:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 00:17:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2020-12-23 00:17:10,246 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 39 [2020-12-23 00:17:10,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:10,246 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2020-12-23 00:17:10,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:17:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2020-12-23 00:17:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:17:10,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:10,250 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:10,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:17:10,464 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2020-12-23 00:17:10,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:10,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079009826] [2020-12-23 00:17:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079009826] [2020-12-23 00:17:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400437694] [2020-12-23 00:17:10,719 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:10,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 00:17:10,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:10,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:17:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:11,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:17:11,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614726876] [2020-12-23 00:17:11,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:17:11,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:17:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:17:11,049 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 21 states. [2020-12-23 00:17:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:11,245 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2020-12-23 00:17:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:17:11,246 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-23 00:17:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:11,247 INFO L225 Difference]: With dead ends: 266 [2020-12-23 00:17:11,247 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:17:11,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:17:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:17:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2020-12-23 00:17:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:17:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2020-12-23 00:17:11,253 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 41 [2020-12-23 00:17:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:11,253 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2020-12-23 00:17:11,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:17:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2020-12-23 00:17:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:17:11,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:11,254 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:11,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:17:11,468 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2020-12-23 00:17:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:11,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696764208] [2020-12-23 00:17:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:11,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696764208] [2020-12-23 00:17:11,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374089160] [2020-12-23 00:17:11,728 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:12,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:17:12,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:12,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:17:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:12,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:12,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:17:12,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667439955] [2020-12-23 00:17:12,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:17:12,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:17:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:17:12,620 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand 22 states. [2020-12-23 00:17:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:12,837 INFO L93 Difference]: Finished difference Result 280 states and 303 transitions. [2020-12-23 00:17:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:17:12,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-12-23 00:17:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:12,839 INFO L225 Difference]: With dead ends: 280 [2020-12-23 00:17:12,839 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 00:17:12,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:17:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 00:17:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 143. [2020-12-23 00:17:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 00:17:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2020-12-23 00:17:12,846 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 43 [2020-12-23 00:17:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:12,846 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2020-12-23 00:17:12,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:17:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2020-12-23 00:17:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:17:12,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:12,847 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:13,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:13,054 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2020-12-23 00:17:13,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:13,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451045975] [2020-12-23 00:17:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:13,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451045975] [2020-12-23 00:17:13,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315616784] [2020-12-23 00:17:13,392 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:13,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:17:13,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:13,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:13,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:17:13,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84159860] [2020-12-23 00:17:13,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:17:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:13,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:17:13,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:17:13,539 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand 23 states. [2020-12-23 00:17:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:13,762 INFO L93 Difference]: Finished difference Result 294 states and 318 transitions. [2020-12-23 00:17:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:17:13,762 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-12-23 00:17:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:13,764 INFO L225 Difference]: With dead ends: 294 [2020-12-23 00:17:13,764 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 00:17:13,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:17:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 00:17:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-12-23 00:17:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:17:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2020-12-23 00:17:13,770 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 45 [2020-12-23 00:17:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:13,770 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2020-12-23 00:17:13,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:17:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2020-12-23 00:17:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:17:13,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:13,771 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:13,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:13,985 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:13,985 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2020-12-23 00:17:13,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:13,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880651469] [2020-12-23 00:17:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880651469] [2020-12-23 00:17:14,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371751190] [2020-12-23 00:17:14,305 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:14,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:17:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:14,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:14,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 00:17:14,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471907211] [2020-12-23 00:17:14,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:17:14,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:17:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:17:14,435 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand 24 states. [2020-12-23 00:17:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:14,655 INFO L93 Difference]: Finished difference Result 308 states and 333 transitions. [2020-12-23 00:17:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:17:14,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-12-23 00:17:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:14,657 INFO L225 Difference]: With dead ends: 308 [2020-12-23 00:17:14,657 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 00:17:14,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:17:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 00:17:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 157. [2020-12-23 00:17:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 00:17:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2020-12-23 00:17:14,663 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 47 [2020-12-23 00:17:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:14,663 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2020-12-23 00:17:14,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:17:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2020-12-23 00:17:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:17:14,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:14,664 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:14,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:17:14,879 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:14,879 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2020-12-23 00:17:14,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:14,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805813402] [2020-12-23 00:17:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:15,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805813402] [2020-12-23 00:17:15,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751430341] [2020-12-23 00:17:15,243 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:16,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 00:17:16,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:16,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:17:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:16,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:16,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 00:17:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157529870] [2020-12-23 00:17:16,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 00:17:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 00:17:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:17:16,649 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 25 states. [2020-12-23 00:17:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:16,891 INFO L93 Difference]: Finished difference Result 322 states and 348 transitions. [2020-12-23 00:17:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:17:16,891 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-12-23 00:17:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:16,893 INFO L225 Difference]: With dead ends: 322 [2020-12-23 00:17:16,893 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 00:17:16,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:17:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 00:17:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 164. [2020-12-23 00:17:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 00:17:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2020-12-23 00:17:16,904 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 49 [2020-12-23 00:17:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:16,904 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2020-12-23 00:17:16,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 00:17:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2020-12-23 00:17:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:17:16,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:16,905 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:17,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:17:17,118 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:17,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2020-12-23 00:17:17,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:17,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912093954] [2020-12-23 00:17:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912093954] [2020-12-23 00:17:17,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805759076] [2020-12-23 00:17:17,486 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:17,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:17,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:17:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:17,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:17,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 00:17:17,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166402623] [2020-12-23 00:17:17,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:17:17,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:17:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:17:17,620 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand 26 states. [2020-12-23 00:17:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:17,885 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2020-12-23 00:17:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 00:17:17,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-12-23 00:17:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:17,887 INFO L225 Difference]: With dead ends: 336 [2020-12-23 00:17:17,887 INFO L226 Difference]: Without dead ends: 219 [2020-12-23 00:17:17,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:17:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-23 00:17:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2020-12-23 00:17:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 00:17:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2020-12-23 00:17:17,894 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 51 [2020-12-23 00:17:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:17,894 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2020-12-23 00:17:17,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:17:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2020-12-23 00:17:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 00:17:17,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:17,895 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:18,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:18,110 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2020-12-23 00:17:18,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:18,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246082926] [2020-12-23 00:17:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:18,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246082926] [2020-12-23 00:17:18,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643649966] [2020-12-23 00:17:18,487 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:18,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 00:17:18,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:17:18,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:19,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:19,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 00:17:19,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188201714] [2020-12-23 00:17:19,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:17:19,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:19,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:17:19,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:17:19,049 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 27 states. [2020-12-23 00:17:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:19,307 INFO L93 Difference]: Finished difference Result 350 states and 378 transitions. [2020-12-23 00:17:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:17:19,308 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-12-23 00:17:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:19,309 INFO L225 Difference]: With dead ends: 350 [2020-12-23 00:17:19,309 INFO L226 Difference]: Without dead ends: 228 [2020-12-23 00:17:19,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:17:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-23 00:17:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2020-12-23 00:17:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 00:17:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2020-12-23 00:17:19,316 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 53 [2020-12-23 00:17:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:19,317 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2020-12-23 00:17:19,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:17:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2020-12-23 00:17:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:17:19,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:19,317 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:19,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:17:19,527 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2020-12-23 00:17:19,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:19,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737140709] [2020-12-23 00:17:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:19,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737140709] [2020-12-23 00:17:19,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267744708] [2020-12-23 00:17:19,974 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:22,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 00:17:22,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:22,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:17:22,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:23,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:23,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:17:23,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798461093] [2020-12-23 00:17:23,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:17:23,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:17:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:17:23,044 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand 28 states. [2020-12-23 00:17:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:23,334 INFO L93 Difference]: Finished difference Result 364 states and 393 transitions. [2020-12-23 00:17:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:17:23,335 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2020-12-23 00:17:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:23,336 INFO L225 Difference]: With dead ends: 364 [2020-12-23 00:17:23,337 INFO L226 Difference]: Without dead ends: 237 [2020-12-23 00:17:23,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:17:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-23 00:17:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 185. [2020-12-23 00:17:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 00:17:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2020-12-23 00:17:23,343 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 55 [2020-12-23 00:17:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:23,344 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2020-12-23 00:17:23,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:17:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2020-12-23 00:17:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:17:23,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:23,345 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:23,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:23,559 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1300597277, now seen corresponding path program 25 times [2020-12-23 00:17:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:23,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282272749] [2020-12-23 00:17:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:24,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282272749] [2020-12-23 00:17:24,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599149533] [2020-12-23 00:17:24,001 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:17:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:24,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:24,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:17:24,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707190888] [2020-12-23 00:17:24,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:17:24,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:17:24,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:17:24,136 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand 29 states. [2020-12-23 00:17:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:24,468 INFO L93 Difference]: Finished difference Result 378 states and 408 transitions. [2020-12-23 00:17:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:17:24,468 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-12-23 00:17:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:24,470 INFO L225 Difference]: With dead ends: 378 [2020-12-23 00:17:24,470 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 00:17:24,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:17:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 00:17:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 192. [2020-12-23 00:17:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 00:17:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 220 transitions. [2020-12-23 00:17:24,477 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 220 transitions. Word has length 57 [2020-12-23 00:17:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:24,477 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 220 transitions. [2020-12-23 00:17:24,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:17:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 220 transitions. [2020-12-23 00:17:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:17:24,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:24,478 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:24,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:17:24,692 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882843, now seen corresponding path program 26 times [2020-12-23 00:17:24,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:24,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163608952] [2020-12-23 00:17:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163608952] [2020-12-23 00:17:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732037721] [2020-12-23 00:17:25,198 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:25,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:17:25,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:17:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:25,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:25,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 00:17:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159350321] [2020-12-23 00:17:25,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:17:25,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:17:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:17:25,335 INFO L87 Difference]: Start difference. First operand 192 states and 220 transitions. Second operand 30 states. [2020-12-23 00:17:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:25,652 INFO L93 Difference]: Finished difference Result 392 states and 423 transitions. [2020-12-23 00:17:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:17:25,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-12-23 00:17:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:25,654 INFO L225 Difference]: With dead ends: 392 [2020-12-23 00:17:25,655 INFO L226 Difference]: Without dead ends: 255 [2020-12-23 00:17:25,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:17:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-23 00:17:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 199. [2020-12-23 00:17:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 00:17:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 228 transitions. [2020-12-23 00:17:25,662 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 228 transitions. Word has length 59 [2020-12-23 00:17:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:25,662 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 228 transitions. [2020-12-23 00:17:25,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:17:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 228 transitions. [2020-12-23 00:17:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:17:25,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:25,663 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:25,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:17:25,877 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash 654124313, now seen corresponding path program 27 times [2020-12-23 00:17:25,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:25,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439123024] [2020-12-23 00:17:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:26,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439123024] [2020-12-23 00:17:26,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563816934] [2020-12-23 00:17:26,410 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:30,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 00:17:30,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:30,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:17:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:31,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:31,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:17:31,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641377078] [2020-12-23 00:17:31,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:17:31,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:31,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:17:31,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:17:31,011 INFO L87 Difference]: Start difference. First operand 199 states and 228 transitions. Second operand 31 states. [2020-12-23 00:17:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:31,349 INFO L93 Difference]: Finished difference Result 406 states and 438 transitions. [2020-12-23 00:17:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:17:31,349 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-12-23 00:17:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:31,351 INFO L225 Difference]: With dead ends: 406 [2020-12-23 00:17:31,351 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 00:17:31,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:17:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 00:17:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 206. [2020-12-23 00:17:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 00:17:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2020-12-23 00:17:31,359 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 61 [2020-12-23 00:17:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:31,359 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2020-12-23 00:17:31,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:17:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2020-12-23 00:17:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:17:31,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:31,360 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:31,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:17:31,575 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:31,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1101344937, now seen corresponding path program 28 times [2020-12-23 00:17:31,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:31,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30473742] [2020-12-23 00:17:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:32,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30473742] [2020-12-23 00:17:32,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321339047] [2020-12-23 00:17:32,143 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:32,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:17:32,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:32,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:17:32,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:32,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:32,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 00:17:32,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540991034] [2020-12-23 00:17:32,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:17:32,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:32,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:17:32,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:17:32,312 INFO L87 Difference]: Start difference. First operand 206 states and 236 transitions. Second operand 32 states. [2020-12-23 00:17:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:32,675 INFO L93 Difference]: Finished difference Result 420 states and 453 transitions. [2020-12-23 00:17:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:17:32,676 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2020-12-23 00:17:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:32,677 INFO L225 Difference]: With dead ends: 420 [2020-12-23 00:17:32,677 INFO L226 Difference]: Without dead ends: 273 [2020-12-23 00:17:32,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:17:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-23 00:17:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 213. [2020-12-23 00:17:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-23 00:17:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2020-12-23 00:17:32,685 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 63 [2020-12-23 00:17:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:32,686 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2020-12-23 00:17:32,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:17:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2020-12-23 00:17:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:17:32,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:32,687 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:32,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:17:32,901 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:32,902 INFO L82 PathProgramCache]: Analyzing trace with hash -185146859, now seen corresponding path program 29 times [2020-12-23 00:17:32,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:32,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93403417] [2020-12-23 00:17:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:33,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93403417] [2020-12-23 00:17:33,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99590031] [2020-12-23 00:17:33,538 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:34,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 00:17:34,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:17:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:17:34,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:17:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:34,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:17:34,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 00:17:34,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881102105] [2020-12-23 00:17:34,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:17:34,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:17:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:17:34,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:17:34,264 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand 33 states. [2020-12-23 00:17:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:17:34,667 INFO L93 Difference]: Finished difference Result 434 states and 468 transitions. [2020-12-23 00:17:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:17:34,668 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-23 00:17:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:17:34,669 INFO L225 Difference]: With dead ends: 434 [2020-12-23 00:17:34,670 INFO L226 Difference]: Without dead ends: 282 [2020-12-23 00:17:34,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:17:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-23 00:17:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2020-12-23 00:17:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-23 00:17:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 252 transitions. [2020-12-23 00:17:34,684 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 252 transitions. Word has length 65 [2020-12-23 00:17:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:17:34,684 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 252 transitions. [2020-12-23 00:17:34,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:17:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 252 transitions. [2020-12-23 00:17:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:17:34,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:17:34,685 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:17:34,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:17:34,900 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:17:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:17:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash -187089581, now seen corresponding path program 30 times [2020-12-23 00:17:34,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:17:34,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703749828] [2020-12-23 00:17:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:17:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:17:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:17:35,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703749828] [2020-12-23 00:17:35,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893779714] [2020-12-23 00:17:35,543 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:02,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 00:18:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:18:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:03,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:03,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:18:03,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024047512] [2020-12-23 00:18:03,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:18:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:03,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:18:03,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:18:03,074 INFO L87 Difference]: Start difference. First operand 220 states and 252 transitions. Second operand 34 states. [2020-12-23 00:18:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:03,500 INFO L93 Difference]: Finished difference Result 448 states and 483 transitions. [2020-12-23 00:18:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:18:03,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2020-12-23 00:18:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:03,503 INFO L225 Difference]: With dead ends: 448 [2020-12-23 00:18:03,503 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 00:18:03,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:18:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 00:18:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 227. [2020-12-23 00:18:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-23 00:18:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 260 transitions. [2020-12-23 00:18:03,510 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 260 transitions. Word has length 67 [2020-12-23 00:18:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:03,510 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 260 transitions. [2020-12-23 00:18:03,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:18:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 260 transitions. [2020-12-23 00:18:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:18:03,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:03,511 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:03,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:03,725 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2054045423, now seen corresponding path program 31 times [2020-12-23 00:18:03,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:03,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874077548] [2020-12-23 00:18:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:04,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874077548] [2020-12-23 00:18:04,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761035360] [2020-12-23 00:18:04,461 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:18:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:04,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:04,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:18:04,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856465541] [2020-12-23 00:18:04,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:18:04,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:18:04,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:18:04,622 INFO L87 Difference]: Start difference. First operand 227 states and 260 transitions. Second operand 35 states. [2020-12-23 00:18:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:05,024 INFO L93 Difference]: Finished difference Result 462 states and 498 transitions. [2020-12-23 00:18:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:18:05,025 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2020-12-23 00:18:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:05,026 INFO L225 Difference]: With dead ends: 462 [2020-12-23 00:18:05,026 INFO L226 Difference]: Without dead ends: 300 [2020-12-23 00:18:05,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:18:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-23 00:18:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 234. [2020-12-23 00:18:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-23 00:18:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 268 transitions. [2020-12-23 00:18:05,035 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 268 transitions. Word has length 69 [2020-12-23 00:18:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:05,035 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 268 transitions. [2020-12-23 00:18:05,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:18:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 268 transitions. [2020-12-23 00:18:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:18:05,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:05,036 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:05,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:05,251 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash -902279857, now seen corresponding path program 32 times [2020-12-23 00:18:05,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:05,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198216444] [2020-12-23 00:18:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198216444] [2020-12-23 00:18:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488672081] [2020-12-23 00:18:05,947 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:06,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:18:06,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:06,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:18:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:06,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:06,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 00:18:06,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882643469] [2020-12-23 00:18:06,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:18:06,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:06,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:18:06,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:18:06,119 INFO L87 Difference]: Start difference. First operand 234 states and 268 transitions. Second operand 36 states. [2020-12-23 00:18:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:06,543 INFO L93 Difference]: Finished difference Result 476 states and 513 transitions. [2020-12-23 00:18:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:18:06,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2020-12-23 00:18:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:06,545 INFO L225 Difference]: With dead ends: 476 [2020-12-23 00:18:06,545 INFO L226 Difference]: Without dead ends: 309 [2020-12-23 00:18:06,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:18:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-23 00:18:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 241. [2020-12-23 00:18:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 00:18:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2020-12-23 00:18:06,553 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 71 [2020-12-23 00:18:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:06,553 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2020-12-23 00:18:06,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:18:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2020-12-23 00:18:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:18:06,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:06,554 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:06,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:18:06,769 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2137833997, now seen corresponding path program 33 times [2020-12-23 00:18:06,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:06,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736839761] [2020-12-23 00:18:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:07,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736839761] [2020-12-23 00:18:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732306299] [2020-12-23 00:18:07,558 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:17,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 00:18:17,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:17,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:18:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:18,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:18,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 00:18:18,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677056674] [2020-12-23 00:18:18,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:18:18,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:18,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:18:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:18:18,096 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand 37 states. [2020-12-23 00:18:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:18,492 INFO L93 Difference]: Finished difference Result 490 states and 528 transitions. [2020-12-23 00:18:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:18:18,492 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2020-12-23 00:18:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:18,495 INFO L225 Difference]: With dead ends: 490 [2020-12-23 00:18:18,495 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 00:18:18,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:18:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 00:18:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 248. [2020-12-23 00:18:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-23 00:18:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 284 transitions. [2020-12-23 00:18:18,505 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 284 transitions. Word has length 73 [2020-12-23 00:18:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:18,505 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 284 transitions. [2020-12-23 00:18:18,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:18:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 284 transitions. [2020-12-23 00:18:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:18:18,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:18,506 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:18,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:18,720 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1185480885, now seen corresponding path program 34 times [2020-12-23 00:18:18,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:18,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890146654] [2020-12-23 00:18:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:19,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890146654] [2020-12-23 00:18:19,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022097025] [2020-12-23 00:18:19,546 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:19,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:18:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:18:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:19,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:19,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 00:18:19,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232859558] [2020-12-23 00:18:19,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:18:19,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:19,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:18:19,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:18:19,712 INFO L87 Difference]: Start difference. First operand 248 states and 284 transitions. Second operand 38 states. [2020-12-23 00:18:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:20,129 INFO L93 Difference]: Finished difference Result 504 states and 543 transitions. [2020-12-23 00:18:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:18:20,133 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2020-12-23 00:18:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:20,134 INFO L225 Difference]: With dead ends: 504 [2020-12-23 00:18:20,134 INFO L226 Difference]: Without dead ends: 327 [2020-12-23 00:18:20,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:18:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-23 00:18:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2020-12-23 00:18:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-23 00:18:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 292 transitions. [2020-12-23 00:18:20,142 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 292 transitions. Word has length 75 [2020-12-23 00:18:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:20,142 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 292 transitions. [2020-12-23 00:18:20,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:18:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 292 transitions. [2020-12-23 00:18:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:18:20,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:20,143 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:20,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:18:20,357 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash 564585737, now seen corresponding path program 35 times [2020-12-23 00:18:20,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:20,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830142815] [2020-12-23 00:18:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:21,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830142815] [2020-12-23 00:18:21,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330431681] [2020-12-23 00:18:21,233 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:26,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 00:18:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:18:26,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:18:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:18:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:26,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:18:26,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 00:18:26,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984936195] [2020-12-23 00:18:26,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:18:26,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:18:26,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:18:26,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:18:26,912 INFO L87 Difference]: Start difference. First operand 255 states and 292 transitions. Second operand 39 states. [2020-12-23 00:18:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:18:27,422 INFO L93 Difference]: Finished difference Result 518 states and 558 transitions. [2020-12-23 00:18:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:18:27,422 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2020-12-23 00:18:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:18:27,424 INFO L225 Difference]: With dead ends: 518 [2020-12-23 00:18:27,424 INFO L226 Difference]: Without dead ends: 336 [2020-12-23 00:18:27,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:18:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-23 00:18:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 262. [2020-12-23 00:18:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-23 00:18:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2020-12-23 00:18:27,432 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 77 [2020-12-23 00:18:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:18:27,432 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2020-12-23 00:18:27,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:18:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2020-12-23 00:18:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:18:27,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:18:27,433 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:18:27,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:18:27,648 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:18:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:18:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1248570553, now seen corresponding path program 36 times [2020-12-23 00:18:27,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:18:27,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598881376] [2020-12-23 00:18:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:18:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:18:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:18:28,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598881376] [2020-12-23 00:18:28,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515694897] [2020-12-23 00:18:28,611 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:16,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 00:19:16,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:16,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:19:16,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:16,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:16,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:19:16,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773004581] [2020-12-23 00:19:16,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:19:16,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:16,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:19:16,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:19:16,373 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand 40 states. [2020-12-23 00:19:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:16,828 INFO L93 Difference]: Finished difference Result 532 states and 573 transitions. [2020-12-23 00:19:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:19:16,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2020-12-23 00:19:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:16,831 INFO L225 Difference]: With dead ends: 532 [2020-12-23 00:19:16,831 INFO L226 Difference]: Without dead ends: 345 [2020-12-23 00:19:16,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:19:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-23 00:19:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2020-12-23 00:19:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-23 00:19:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2020-12-23 00:19:16,840 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 79 [2020-12-23 00:19:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:16,840 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2020-12-23 00:19:16,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:19:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2020-12-23 00:19:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:19:16,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:16,841 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:17,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:19:17,057 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash 64956933, now seen corresponding path program 37 times [2020-12-23 00:19:17,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:17,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753317653] [2020-12-23 00:19:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:18,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753317653] [2020-12-23 00:19:18,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027605745] [2020-12-23 00:19:18,091 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:19:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:18,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:18,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:19:18,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477797910] [2020-12-23 00:19:18,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:19:18,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:19:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:19:18,294 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand 41 states. [2020-12-23 00:19:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:18,796 INFO L93 Difference]: Finished difference Result 546 states and 588 transitions. [2020-12-23 00:19:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:19:18,797 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2020-12-23 00:19:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:18,799 INFO L225 Difference]: With dead ends: 546 [2020-12-23 00:19:18,799 INFO L226 Difference]: Without dead ends: 354 [2020-12-23 00:19:18,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:19:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-23 00:19:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2020-12-23 00:19:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-23 00:19:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2020-12-23 00:19:18,808 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 81 [2020-12-23 00:19:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:18,809 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2020-12-23 00:19:18,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:19:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2020-12-23 00:19:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 00:19:18,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:18,810 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:19,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:19:19,025 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:19,026 INFO L82 PathProgramCache]: Analyzing trace with hash -355514045, now seen corresponding path program 38 times [2020-12-23 00:19:19,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:19,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117204358] [2020-12-23 00:19:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:20,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117204358] [2020-12-23 00:19:20,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642036998] [2020-12-23 00:19:20,024 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:20,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:19:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:19:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 00:19:20,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879944507] [2020-12-23 00:19:20,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 00:19:20,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 00:19:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:19:20,202 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand 42 states. [2020-12-23 00:19:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:20,709 INFO L93 Difference]: Finished difference Result 560 states and 603 transitions. [2020-12-23 00:19:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:19:20,709 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2020-12-23 00:19:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:20,711 INFO L225 Difference]: With dead ends: 560 [2020-12-23 00:19:20,711 INFO L226 Difference]: Without dead ends: 363 [2020-12-23 00:19:20,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:19:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-23 00:19:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 283. [2020-12-23 00:19:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-23 00:19:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 324 transitions. [2020-12-23 00:19:20,720 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 324 transitions. Word has length 83 [2020-12-23 00:19:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:20,720 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 324 transitions. [2020-12-23 00:19:20,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 00:19:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 324 transitions. [2020-12-23 00:19:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 00:19:20,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:20,721 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:20,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:19:20,937 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash -701198079, now seen corresponding path program 39 times [2020-12-23 00:19:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:20,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766850443] [2020-12-23 00:19:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:22,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766850443] [2020-12-23 00:19:22,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024644616] [2020-12-23 00:19:22,018 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:44,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 00:20:44,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:44,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:20:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:44,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:44,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 00:20:44,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163144545] [2020-12-23 00:20:44,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:20:44,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:44,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:20:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:20:44,400 INFO L87 Difference]: Start difference. First operand 283 states and 324 transitions. Second operand 43 states. [2020-12-23 00:20:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:44,934 INFO L93 Difference]: Finished difference Result 574 states and 618 transitions. [2020-12-23 00:20:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 00:20:44,935 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2020-12-23 00:20:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:44,937 INFO L225 Difference]: With dead ends: 574 [2020-12-23 00:20:44,938 INFO L226 Difference]: Without dead ends: 372 [2020-12-23 00:20:44,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:20:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-23 00:20:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 290. [2020-12-23 00:20:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-23 00:20:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2020-12-23 00:20:44,947 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 85 [2020-12-23 00:20:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:44,947 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2020-12-23 00:20:44,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:20:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2020-12-23 00:20:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:20:44,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:44,948 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:45,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:20:45,162 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:45,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2103894335, now seen corresponding path program 40 times [2020-12-23 00:20:45,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:45,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441506493] [2020-12-23 00:20:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441506493] [2020-12-23 00:20:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819454641] [2020-12-23 00:20:46,378 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:46,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:20:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:20:46,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:46,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:46,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 00:20:46,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916352550] [2020-12-23 00:20:46,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:20:46,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:20:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:20:46,570 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand 44 states. [2020-12-23 00:20:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:47,134 INFO L93 Difference]: Finished difference Result 588 states and 633 transitions. [2020-12-23 00:20:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:20:47,135 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2020-12-23 00:20:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:47,137 INFO L225 Difference]: With dead ends: 588 [2020-12-23 00:20:47,137 INFO L226 Difference]: Without dead ends: 381 [2020-12-23 00:20:47,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:20:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-23 00:20:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 297. [2020-12-23 00:20:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-23 00:20:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 340 transitions. [2020-12-23 00:20:47,146 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 340 transitions. Word has length 87 [2020-12-23 00:20:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:47,146 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 340 transitions. [2020-12-23 00:20:47,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:20:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 340 transitions. [2020-12-23 00:20:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:20:47,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:47,147 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:47,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:47,362 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash 558242301, now seen corresponding path program 41 times [2020-12-23 00:20:47,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:47,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026373618] [2020-12-23 00:20:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:48,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026373618] [2020-12-23 00:20:48,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958570854] [2020-12-23 00:20:48,532 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:56,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 00:20:56,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:56,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:20:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:56,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:56,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 00:20:56,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023936115] [2020-12-23 00:20:56,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:20:56,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:56,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:20:56,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:20:56,293 INFO L87 Difference]: Start difference. First operand 297 states and 340 transitions. Second operand 45 states. [2020-12-23 00:20:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:56,863 INFO L93 Difference]: Finished difference Result 602 states and 648 transitions. [2020-12-23 00:20:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:20:56,864 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2020-12-23 00:20:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:56,867 INFO L225 Difference]: With dead ends: 602 [2020-12-23 00:20:56,867 INFO L226 Difference]: Without dead ends: 390 [2020-12-23 00:20:56,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:20:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-23 00:20:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 304. [2020-12-23 00:20:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-23 00:20:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 348 transitions. [2020-12-23 00:20:56,875 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 348 transitions. Word has length 89 [2020-12-23 00:20:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:56,876 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 348 transitions. [2020-12-23 00:20:56,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:20:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 348 transitions. [2020-12-23 00:20:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:20:56,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:56,877 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:57,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 00:20:57,090 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:57,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1245322043, now seen corresponding path program 42 times [2020-12-23 00:20:57,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:57,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600352124] [2020-12-23 00:20:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:58,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600352124] [2020-12-23 00:20:58,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644779807] [2020-12-23 00:20:58,318 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true