/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/reducercommutativity/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:14:11,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:14:11,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:14:11,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:14:11,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:14:11,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:14:11,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:14:11,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:14:11,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:14:11,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:14:11,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:14:11,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-01-06 10:14:12,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:14:12,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:14:12,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:14:12,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:14:12,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:14:12,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:14:12,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:14:12,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:14:12,123 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:14:12,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:14:12,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:14:12,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:14:12,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:14:12,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:14:12,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:14:12,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:14:12,125 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:14:12,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:14:12,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:14:12,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:14:12,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:14:12,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:14:12,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:14:12,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:14:12,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:14:12,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:14:12,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:14:12,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:14:12,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:14:12,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:14:12,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:14:12,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:14:12,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:14:12,644 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:14:12,645 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:14:12,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max40-1.i [2021-01-06 10:14:12,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8817fb2b/0f36556cf74a4040925090074e0ca8a2/FLAG4c9f24c08 [2021-01-06 10:14:13,313 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:14:13,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max40-1.i [2021-01-06 10:14:13,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8817fb2b/0f36556cf74a4040925090074e0ca8a2/FLAG4c9f24c08 [2021-01-06 10:14:13,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8817fb2b/0f36556cf74a4040925090074e0ca8a2 [2021-01-06 10:14:13,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:14:13,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:14:13,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:14:13,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:14:13,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:14:13,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:14:13" (1/1) ... [2021-01-06 10:14:13,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6989d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:13, skipping insertion in model container [2021-01-06 10:14:13,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:14:13" (1/1) ... [2021-01-06 10:14:13,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:14:13,772 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[39]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:14:13,998 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/reducercommutativity/max40-1.i[1290,1303] [2021-01-06 10:14:14,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:14:14,011 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[156],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:14:14,037 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/reducercommutativity/max40-1.i[1290,1303] [2021-01-06 10:14:14,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:14:14,054 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:14:14,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14 WrapperNode [2021-01-06 10:14:14,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:14:14,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:14:14,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:14:14,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:14:14,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:14:14,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:14:14,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:14:14,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:14:14,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... [2021-01-06 10:14:14,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:14:14,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:14:14,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:14:14,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:14:14,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:14:14,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:14:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:14:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:14:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:14:14,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:14:14,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:14:14,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:14:14,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:14:14,745 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:14:14,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:14:14 BoogieIcfgContainer [2021-01-06 10:14:14,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:14:14,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:14:14,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:14:14,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:14:14,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:14:13" (1/3) ... [2021-01-06 10:14:14,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cee533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:14:14, skipping insertion in model container [2021-01-06 10:14:14,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:14" (2/3) ... [2021-01-06 10:14:14,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cee533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:14:14, skipping insertion in model container [2021-01-06 10:14:14,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:14:14" (3/3) ... [2021-01-06 10:14:14,765 INFO L111 eAbstractionObserver]: Analyzing ICFG max40-1.i [2021-01-06 10:14:14,772 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:14:14,782 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:14:14,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:14:14,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:14:14,868 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:14:14,868 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:14:14,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:14:14,869 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:14:14,869 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:14:14,869 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:14:14,869 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:14:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-01-06 10:14:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:14:14,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:14,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:14,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1332003061, now seen corresponding path program 1 times [2021-01-06 10:14:14,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:14,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444415464] [2021-01-06 10:14:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:14:15,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444415464] [2021-01-06 10:14:15,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:14:15,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:14:15,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948651464] [2021-01-06 10:14:15,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:14:15,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:15,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:14:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:14:15,231 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2021-01-06 10:14:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:15,263 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2021-01-06 10:14:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:14:15,265 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 10:14:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:15,278 INFO L225 Difference]: With dead ends: 62 [2021-01-06 10:14:15,279 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:14:15,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:14:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:14:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 10:14:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:14:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-01-06 10:14:15,329 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-01-06 10:14:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:15,329 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-01-06 10:14:15,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:14:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-01-06 10:14:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:14:15,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:15,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:15,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:14:15,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:15,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:15,333 INFO L82 PathProgramCache]: Analyzing trace with hash 741944299, now seen corresponding path program 1 times [2021-01-06 10:14:15,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:15,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194756209] [2021-01-06 10:14:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:14:15,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194756209] [2021-01-06 10:14:15,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:14:15,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:14:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029410652] [2021-01-06 10:14:15,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:14:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:14:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:14:15,397 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2021-01-06 10:14:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:15,417 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-01-06 10:14:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:14:15,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:14:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:15,419 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:14:15,419 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:14:15,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:14:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:14:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:14:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:14:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-01-06 10:14:15,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-01-06 10:14:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:15,427 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-01-06 10:14:15,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:14:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-01-06 10:14:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:14:15,429 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:15,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:15,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:14:15,429 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:15,430 INFO L82 PathProgramCache]: Analyzing trace with hash -826131671, now seen corresponding path program 1 times [2021-01-06 10:14:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:15,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148686811] [2021-01-06 10:14:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:14:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148686811] [2021-01-06 10:14:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522984431] [2021-01-06 10:14:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:15,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:14:15,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:14:15,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:14:15,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:14:15,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744080911] [2021-01-06 10:14:15,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:14:15,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:14:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:15,602 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2021-01-06 10:14:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:15,653 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-01-06 10:14:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:14:15,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:14:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:15,655 INFO L225 Difference]: With dead ends: 62 [2021-01-06 10:14:15,655 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:14:15,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:14:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-01-06 10:14:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:14:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-01-06 10:14:15,669 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2021-01-06 10:14:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:15,669 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-01-06 10:14:15,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:14:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-01-06 10:14:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:14:15,676 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:15,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:15,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:14:15,878 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1925905852, now seen corresponding path program 1 times [2021-01-06 10:14:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:15,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944132921] [2021-01-06 10:14:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:14:15,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944132921] [2021-01-06 10:14:15,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365831365] [2021-01-06 10:14:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:16,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:14:16,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:14:16,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:14:16,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:14:16,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355556955] [2021-01-06 10:14:16,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:14:16,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:14:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:16,142 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 3 states. [2021-01-06 10:14:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:16,177 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:14:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:14:16,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-01-06 10:14:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:16,183 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:14:16,183 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:14:16,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:14:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 10:14:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:14:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-01-06 10:14:16,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2021-01-06 10:14:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:16,198 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-01-06 10:14:16,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:14:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-01-06 10:14:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 10:14:16,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:16,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:16,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:16,416 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1542894914, now seen corresponding path program 1 times [2021-01-06 10:14:16,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:16,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286481139] [2021-01-06 10:14:16,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:14:16,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286481139] [2021-01-06 10:14:16,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924604232] [2021-01-06 10:14:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:16,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:14:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:14:16,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:16,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:14:16,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349419957] [2021-01-06 10:14:16,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:14:16,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:14:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:16,663 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2021-01-06 10:14:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:16,688 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-01-06 10:14:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:14:16,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2021-01-06 10:14:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:16,690 INFO L225 Difference]: With dead ends: 66 [2021-01-06 10:14:16,690 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 10:14:16,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 10:14:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 10:14:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:14:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-01-06 10:14:16,698 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 33 [2021-01-06 10:14:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:16,698 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-01-06 10:14:16,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:14:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-01-06 10:14:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:14:16,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:16,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:16,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:16,913 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1235585152, now seen corresponding path program 2 times [2021-01-06 10:14:16,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:16,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881106275] [2021-01-06 10:14:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:14:16,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881106275] [2021-01-06 10:14:16,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280171704] [2021-01-06 10:14:16,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:17,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:14:17,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:14:17,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:14:17,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:17,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:14:17,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845805303] [2021-01-06 10:14:17,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:14:17,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:14:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:14:17,120 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 7 states. [2021-01-06 10:14:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:17,207 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2021-01-06 10:14:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:14:17,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:14:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:17,209 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:14:17,209 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:14:17,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:14:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:14:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-01-06 10:14:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 10:14:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-01-06 10:14:17,219 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 35 [2021-01-06 10:14:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:17,219 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-01-06 10:14:17,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:14:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-01-06 10:14:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:14:17,221 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:17,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:17,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:17,436 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:17,438 INFO L82 PathProgramCache]: Analyzing trace with hash 145959385, now seen corresponding path program 3 times [2021-01-06 10:14:17,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:17,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772197612] [2021-01-06 10:14:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:14:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772197612] [2021-01-06 10:14:17,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879516016] [2021-01-06 10:14:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:17,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:14:17,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:14:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:14:17,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:17,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:14:17,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765442305] [2021-01-06 10:14:17,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:14:17,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:14:17,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:17,711 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2021-01-06 10:14:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:17,750 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-01-06 10:14:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:14:17,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2021-01-06 10:14:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:17,752 INFO L225 Difference]: With dead ends: 68 [2021-01-06 10:14:17,752 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:14:17,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:14:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-01-06 10:14:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:14:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-01-06 10:14:17,760 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-01-06 10:14:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:17,761 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-01-06 10:14:17,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:14:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-01-06 10:14:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:14:17,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:17,763 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:17,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:14:17,978 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash -523940009, now seen corresponding path program 4 times [2021-01-06 10:14:17,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:17,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139636840] [2021-01-06 10:14:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:14:18,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139636840] [2021-01-06 10:14:18,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235273914] [2021-01-06 10:14:18,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:18,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:14:18,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:18,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:14:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:14:18,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:18,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:14:18,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771202250] [2021-01-06 10:14:18,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:14:18,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:18,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:14:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:14:18,211 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2021-01-06 10:14:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:18,235 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2021-01-06 10:14:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:14:18,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2021-01-06 10:14:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:18,236 INFO L225 Difference]: With dead ends: 98 [2021-01-06 10:14:18,237 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 10:14:18,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:14:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 10:14:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 10:14:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:14:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-01-06 10:14:18,244 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2021-01-06 10:14:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:18,244 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-01-06 10:14:18,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:14:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-01-06 10:14:18,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:14:18,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:18,246 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:18,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:18,460 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1019809557, now seen corresponding path program 5 times [2021-01-06 10:14:18,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:18,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204722940] [2021-01-06 10:14:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:14:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204722940] [2021-01-06 10:14:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928389389] [2021-01-06 10:14:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:18,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:14:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:14:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 10:14:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:18,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 10:14:18,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781378693] [2021-01-06 10:14:18,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:14:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:14:18,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:14:18,813 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 10 states. [2021-01-06 10:14:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:18,864 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2021-01-06 10:14:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:14:18,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2021-01-06 10:14:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:18,865 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:14:18,865 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:14:18,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:14:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:14:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-01-06 10:14:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 10:14:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-01-06 10:14:18,873 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 53 [2021-01-06 10:14:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:18,873 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-01-06 10:14:18,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:14:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-01-06 10:14:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:14:18,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:18,875 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:19,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:19,092 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1753708975, now seen corresponding path program 6 times [2021-01-06 10:14:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:19,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902925775] [2021-01-06 10:14:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:14:19,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902925775] [2021-01-06 10:14:19,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492096786] [2021-01-06 10:14:19,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:19,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:14:19,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:19,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:14:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:14:19,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:19,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-01-06 10:14:19,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235231790] [2021-01-06 10:14:19,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:14:19,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:19,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:14:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:14:19,565 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 11 states. [2021-01-06 10:14:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:19,689 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2021-01-06 10:14:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:14:19,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2021-01-06 10:14:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:19,691 INFO L225 Difference]: With dead ends: 127 [2021-01-06 10:14:19,691 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 10:14:19,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:14:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 10:14:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-01-06 10:14:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:14:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-01-06 10:14:19,700 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 57 [2021-01-06 10:14:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:19,700 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-01-06 10:14:19,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:14:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-01-06 10:14:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:14:19,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:19,701 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:19,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:14:19,915 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:19,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1901797290, now seen corresponding path program 7 times [2021-01-06 10:14:19,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:19,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419475621] [2021-01-06 10:14:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 10:14:20,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419475621] [2021-01-06 10:14:20,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155725843] [2021-01-06 10:14:20,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:20,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:14:20,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 10:14:20,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:20,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:14:20,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198036817] [2021-01-06 10:14:20,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:14:20,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:14:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:14:20,246 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 10 states. [2021-01-06 10:14:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:20,285 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-01-06 10:14:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:14:20,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2021-01-06 10:14:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:20,287 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:14:20,287 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:14:20,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:14:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:14:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 10:14:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:14:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2021-01-06 10:14:20,295 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 71 [2021-01-06 10:14:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:20,295 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2021-01-06 10:14:20,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:14:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2021-01-06 10:14:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:14:20,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:20,297 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:20,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:20,511 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash 646943848, now seen corresponding path program 8 times [2021-01-06 10:14:20,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:20,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217738819] [2021-01-06 10:14:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 10:14:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217738819] [2021-01-06 10:14:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551556013] [2021-01-06 10:14:20,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:20,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:14:20,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:14:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 10:14:20,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:20,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:14:20,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143650417] [2021-01-06 10:14:20,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:14:20,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:14:20,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:14:20,857 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 11 states. [2021-01-06 10:14:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:20,895 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2021-01-06 10:14:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:14:20,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2021-01-06 10:14:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:20,897 INFO L225 Difference]: With dead ends: 134 [2021-01-06 10:14:20,897 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:14:20,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:14:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:14:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-01-06 10:14:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:14:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2021-01-06 10:14:20,904 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 73 [2021-01-06 10:14:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:20,905 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2021-01-06 10:14:20,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:14:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2021-01-06 10:14:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:14:20,906 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:20,906 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:21,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:21,120 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:21,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1618596262, now seen corresponding path program 9 times [2021-01-06 10:14:21,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:21,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860486568] [2021-01-06 10:14:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 10:14:21,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860486568] [2021-01-06 10:14:21,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069245636] [2021-01-06 10:14:21,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:21,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:14:21,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:14:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 10:14:21,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:21,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-01-06 10:14:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358621390] [2021-01-06 10:14:21,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:14:21,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:14:21,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:14:21,686 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 15 states. [2021-01-06 10:14:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:21,874 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2021-01-06 10:14:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:14:21,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2021-01-06 10:14:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:21,876 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:14:21,876 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 10:14:21,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:14:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 10:14:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-01-06 10:14:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:14:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-01-06 10:14:21,904 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 75 [2021-01-06 10:14:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:21,906 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-01-06 10:14:21,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:14:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-01-06 10:14:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:14:21,909 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:21,909 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:22,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:14:22,124 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash 92897279, now seen corresponding path program 10 times [2021-01-06 10:14:22,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:22,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419735660] [2021-01-06 10:14:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 10:14:22,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419735660] [2021-01-06 10:14:22,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661649623] [2021-01-06 10:14:22,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:22,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:14:22,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:22,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:14:22,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 10:14:22,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:22,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:14:22,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479154303] [2021-01-06 10:14:22,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:14:22,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:22,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:14:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:14:22,585 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 13 states. [2021-01-06 10:14:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:22,626 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2021-01-06 10:14:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:14:22,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2021-01-06 10:14:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:22,628 INFO L225 Difference]: With dead ends: 162 [2021-01-06 10:14:22,628 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:14:22,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:14:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:14:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:14:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:14:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2021-01-06 10:14:22,642 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 89 [2021-01-06 10:14:22,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:22,643 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2021-01-06 10:14:22,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:14:22,643 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2021-01-06 10:14:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:14:22,645 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:22,645 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:22,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:14:22,853 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash 779977021, now seen corresponding path program 11 times [2021-01-06 10:14:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:22,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34409851] [2021-01-06 10:14:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-01-06 10:14:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34409851] [2021-01-06 10:14:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595802260] [2021-01-06 10:14:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:23,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:14:23,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:14:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-01-06 10:14:23,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:23,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2021-01-06 10:14:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033934364] [2021-01-06 10:14:23,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:14:23,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:14:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:14:23,436 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 17 states. [2021-01-06 10:14:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:23,520 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2021-01-06 10:14:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:14:23,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2021-01-06 10:14:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:23,522 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:14:23,522 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:14:23,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:14:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:14:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-01-06 10:14:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:14:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2021-01-06 10:14:23,527 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 91 [2021-01-06 10:14:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:23,527 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2021-01-06 10:14:23,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:14:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2021-01-06 10:14:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 10:14:23,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:23,529 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:23,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:14:23,745 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash -105056391, now seen corresponding path program 12 times [2021-01-06 10:14:23,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:23,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121905114] [2021-01-06 10:14:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:14:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121905114] [2021-01-06 10:14:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074665605] [2021-01-06 10:14:23,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:24,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:14:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:24,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:14:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-01-06 10:14:24,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:24,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-01-06 10:14:24,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576597964] [2021-01-06 10:14:24,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:14:24,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:14:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:14:24,669 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 19 states. [2021-01-06 10:14:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:24,756 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2021-01-06 10:14:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:14:24,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2021-01-06 10:14:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:24,758 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:14:24,758 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 10:14:24,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:14:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 10:14:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-01-06 10:14:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 10:14:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-01-06 10:14:24,764 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 95 [2021-01-06 10:14:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:24,764 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-01-06 10:14:24,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:14:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-01-06 10:14:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:14:24,765 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:24,765 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:24,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:24,979 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:24,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1954054069, now seen corresponding path program 13 times [2021-01-06 10:14:24,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:24,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854092189] [2021-01-06 10:14:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 10:14:25,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854092189] [2021-01-06 10:14:25,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603632489] [2021-01-06 10:14:25,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:25,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:14:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 10:14:25,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:25,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:14:25,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475891716] [2021-01-06 10:14:25,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:14:25,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:14:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:14:25,419 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 16 states. [2021-01-06 10:14:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:25,473 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2021-01-06 10:14:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:14:25,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2021-01-06 10:14:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:25,475 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:14:25,475 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:14:25,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:14:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:14:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 10:14:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:14:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2021-01-06 10:14:25,480 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 99 [2021-01-06 10:14:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:25,481 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2021-01-06 10:14:25,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:14:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2021-01-06 10:14:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:14:25,482 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:25,482 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:25,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:14:25,696 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash -259880077, now seen corresponding path program 14 times [2021-01-06 10:14:25,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:25,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462118689] [2021-01-06 10:14:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 10:14:25,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462118689] [2021-01-06 10:14:25,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878754256] [2021-01-06 10:14:25,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:26,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:14:26,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:14:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 10:14:26,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:26,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:14:26,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928580811] [2021-01-06 10:14:26,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:14:26,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:26,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:14:26,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:14:26,160 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 17 states. [2021-01-06 10:14:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:26,207 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2021-01-06 10:14:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:14:26,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2021-01-06 10:14:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:26,209 INFO L225 Difference]: With dead ends: 178 [2021-01-06 10:14:26,209 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:14:26,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:14:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:14:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 10:14:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:14:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2021-01-06 10:14:26,214 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 101 [2021-01-06 10:14:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:26,214 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2021-01-06 10:14:26,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:14:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2021-01-06 10:14:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 10:14:26,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:26,216 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:26,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:14:26,430 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1841782863, now seen corresponding path program 15 times [2021-01-06 10:14:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:26,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794276889] [2021-01-06 10:14:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 10:14:26,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794276889] [2021-01-06 10:14:26,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662556442] [2021-01-06 10:14:26,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:26,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:14:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:14:26,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-01-06 10:14:27,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:27,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-01-06 10:14:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939292081] [2021-01-06 10:14:27,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:14:27,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:14:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:14:27,095 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 22 states. [2021-01-06 10:14:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:27,391 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2021-01-06 10:14:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:14:27,391 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2021-01-06 10:14:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:27,392 INFO L225 Difference]: With dead ends: 201 [2021-01-06 10:14:27,392 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 10:14:27,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:14:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 10:14:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2021-01-06 10:14:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:14:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2021-01-06 10:14:27,398 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 103 [2021-01-06 10:14:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:27,398 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2021-01-06 10:14:27,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:14:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2021-01-06 10:14:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:14:27,400 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:27,400 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:27,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:27,616 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash 868849802, now seen corresponding path program 16 times [2021-01-06 10:14:27,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:27,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660206054] [2021-01-06 10:14:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-01-06 10:14:27,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660206054] [2021-01-06 10:14:27,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149316207] [2021-01-06 10:14:27,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:27,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:14:27,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:14:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-01-06 10:14:28,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:28,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:14:28,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883196764] [2021-01-06 10:14:28,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:14:28,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:28,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:14:28,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:14:28,106 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 19 states. [2021-01-06 10:14:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:28,184 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2021-01-06 10:14:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:14:28,185 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2021-01-06 10:14:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:28,186 INFO L225 Difference]: With dead ends: 206 [2021-01-06 10:14:28,186 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 10:14:28,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:14:28,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 10:14:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-01-06 10:14:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:14:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2021-01-06 10:14:28,192 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 117 [2021-01-06 10:14:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:28,192 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2021-01-06 10:14:28,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:14:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2021-01-06 10:14:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:14:28,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:28,194 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:28,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:28,408 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2012967112, now seen corresponding path program 17 times [2021-01-06 10:14:28,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:28,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529414749] [2021-01-06 10:14:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-01-06 10:14:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529414749] [2021-01-06 10:14:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471689826] [2021-01-06 10:14:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:29,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:14:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:14:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-01-06 10:14:29,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:29,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:14:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417814505] [2021-01-06 10:14:29,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:14:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:14:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:14:29,674 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 20 states. [2021-01-06 10:14:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:29,741 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2021-01-06 10:14:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:14:29,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2021-01-06 10:14:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:29,743 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:14:29,743 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:14:29,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:14:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:14:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-01-06 10:14:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:14:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-01-06 10:14:29,748 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 119 [2021-01-06 10:14:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:29,749 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-01-06 10:14:29,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:14:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-01-06 10:14:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:14:29,750 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:29,750 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:29,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:29,964 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:29,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:29,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1998074246, now seen corresponding path program 18 times [2021-01-06 10:14:29,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:29,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137384988] [2021-01-06 10:14:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-01-06 10:14:30,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137384988] [2021-01-06 10:14:30,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679673986] [2021-01-06 10:14:30,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:30,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:14:30,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:14:30,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-01-06 10:14:31,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:31,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-01-06 10:14:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077783669] [2021-01-06 10:14:31,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:14:31,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:31,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:14:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:14:31,160 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 26 states. [2021-01-06 10:14:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:31,409 INFO L93 Difference]: Finished difference Result 231 states and 278 transitions. [2021-01-06 10:14:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:14:31,412 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2021-01-06 10:14:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:31,413 INFO L225 Difference]: With dead ends: 231 [2021-01-06 10:14:31,413 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 10:14:31,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:14:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 10:14:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2021-01-06 10:14:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:14:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2021-01-06 10:14:31,418 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 121 [2021-01-06 10:14:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:31,419 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2021-01-06 10:14:31,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:14:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2021-01-06 10:14:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:14:31,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:31,420 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:31,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:14:31,636 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:31,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:31,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1951654049, now seen corresponding path program 19 times [2021-01-06 10:14:31,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:31,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909209462] [2021-01-06 10:14:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-01-06 10:14:31,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909209462] [2021-01-06 10:14:31,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727192328] [2021-01-06 10:14:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:32,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:14:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-01-06 10:14:32,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:32,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:14:32,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193801632] [2021-01-06 10:14:32,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:14:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:14:32,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:14:32,245 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand 22 states. [2021-01-06 10:14:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:32,311 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2021-01-06 10:14:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:14:32,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 135 [2021-01-06 10:14:32,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:32,313 INFO L225 Difference]: With dead ends: 236 [2021-01-06 10:14:32,313 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:14:32,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:14:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:14:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-01-06 10:14:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:14:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2021-01-06 10:14:32,319 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2021-01-06 10:14:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:32,319 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2021-01-06 10:14:32,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:14:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2021-01-06 10:14:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:14:32,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:32,321 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:32,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:14:32,535 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:32,536 INFO L82 PathProgramCache]: Analyzing trace with hash 391881757, now seen corresponding path program 20 times [2021-01-06 10:14:32,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:32,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969600002] [2021-01-06 10:14:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-01-06 10:14:32,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969600002] [2021-01-06 10:14:32,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042944656] [2021-01-06 10:14:32,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:33,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:14:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:33,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:14:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-01-06 10:14:33,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:33,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:14:33,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001044086] [2021-01-06 10:14:33,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:14:33,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:33,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:14:33,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:14:33,183 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 23 states. [2021-01-06 10:14:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:33,249 INFO L93 Difference]: Finished difference Result 238 states and 282 transitions. [2021-01-06 10:14:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:14:33,250 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2021-01-06 10:14:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:33,251 INFO L225 Difference]: With dead ends: 238 [2021-01-06 10:14:33,251 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 10:14:33,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:14:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 10:14:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-01-06 10:14:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 10:14:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2021-01-06 10:14:33,256 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 137 [2021-01-06 10:14:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:33,256 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2021-01-06 10:14:33,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:14:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2021-01-06 10:14:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-06 10:14:33,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:33,258 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:33,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:33,473 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:33,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1966928219, now seen corresponding path program 21 times [2021-01-06 10:14:33,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:33,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840692815] [2021-01-06 10:14:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-01-06 10:14:33,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840692815] [2021-01-06 10:14:33,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321515760] [2021-01-06 10:14:33,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:34,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:14:34,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:34,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:14:34,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-01-06 10:14:34,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:34,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-01-06 10:14:34,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489810478] [2021-01-06 10:14:34,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:14:34,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:14:34,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:14:34,495 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 29 states. [2021-01-06 10:14:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:34,628 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2021-01-06 10:14:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:14:34,629 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 139 [2021-01-06 10:14:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:34,630 INFO L225 Difference]: With dead ends: 243 [2021-01-06 10:14:34,630 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 10:14:34,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:14:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 10:14:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-01-06 10:14:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 10:14:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2021-01-06 10:14:34,636 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 139 [2021-01-06 10:14:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:34,636 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2021-01-06 10:14:34,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:14:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2021-01-06 10:14:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-01-06 10:14:34,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:34,638 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:34,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:14:34,851 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:34,852 INFO L82 PathProgramCache]: Analyzing trace with hash 177802135, now seen corresponding path program 22 times [2021-01-06 10:14:34,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:34,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592939463] [2021-01-06 10:14:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-01-06 10:14:35,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592939463] [2021-01-06 10:14:35,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113284674] [2021-01-06 10:14:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:35,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:14:35,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:35,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:14:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-01-06 10:14:35,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:35,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:14:35,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743044926] [2021-01-06 10:14:35,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:14:35,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:35,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:14:35,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:14:35,536 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand 25 states. [2021-01-06 10:14:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:35,628 INFO L93 Difference]: Finished difference Result 246 states and 290 transitions. [2021-01-06 10:14:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:14:35,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 143 [2021-01-06 10:14:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:35,629 INFO L225 Difference]: With dead ends: 246 [2021-01-06 10:14:35,630 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:14:35,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:14:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:14:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-01-06 10:14:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 10:14:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2021-01-06 10:14:35,635 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 143 [2021-01-06 10:14:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:35,635 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2021-01-06 10:14:35,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:14:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2021-01-06 10:14:35,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 10:14:35,637 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:35,637 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:35,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:35,852 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash -884018603, now seen corresponding path program 23 times [2021-01-06 10:14:35,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:35,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132614570] [2021-01-06 10:14:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-01-06 10:14:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132614570] [2021-01-06 10:14:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201923910] [2021-01-06 10:14:36,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:38,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:14:38,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:14:38,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-01-06 10:14:38,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:38,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 10:14:38,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166181803] [2021-01-06 10:14:38,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:14:38,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:38,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:14:38,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:14:38,415 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand 32 states. [2021-01-06 10:14:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:38,723 INFO L93 Difference]: Finished difference Result 269 states and 322 transitions. [2021-01-06 10:14:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:14:38,724 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2021-01-06 10:14:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:38,725 INFO L225 Difference]: With dead ends: 269 [2021-01-06 10:14:38,725 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:14:38,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:14:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:14:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-01-06 10:14:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:14:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2021-01-06 10:14:38,732 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 145 [2021-01-06 10:14:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:38,732 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2021-01-06 10:14:38,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:14:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2021-01-06 10:14:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 10:14:38,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:38,734 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:38,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:14:38,948 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2042535342, now seen corresponding path program 24 times [2021-01-06 10:14:38,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:38,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609481326] [2021-01-06 10:14:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-01-06 10:14:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609481326] [2021-01-06 10:14:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275272049] [2021-01-06 10:14:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:40,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:14:40,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:14:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-01-06 10:14:40,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:40,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2021-01-06 10:14:40,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396981412] [2021-01-06 10:14:40,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 10:14:40,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 10:14:40,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:14:40,462 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand 33 states. [2021-01-06 10:14:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:40,589 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2021-01-06 10:14:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:14:40,590 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 159 [2021-01-06 10:14:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:40,591 INFO L225 Difference]: With dead ends: 277 [2021-01-06 10:14:40,591 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 10:14:40,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 10:14:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 10:14:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-01-06 10:14:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 10:14:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2021-01-06 10:14:40,598 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 159 [2021-01-06 10:14:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:40,598 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2021-01-06 10:14:40,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 10:14:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2021-01-06 10:14:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-01-06 10:14:40,601 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:40,601 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:40,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:14:40,816 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2098595818, now seen corresponding path program 25 times [2021-01-06 10:14:40,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:40,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932549001] [2021-01-06 10:14:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:41,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932549001] [2021-01-06 10:14:41,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247480805] [2021-01-06 10:14:41,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:14:41,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:41,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:41,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:14:41,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974119667] [2021-01-06 10:14:41,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:14:41,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:14:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:14:41,606 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand 28 states. [2021-01-06 10:14:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:41,711 INFO L93 Difference]: Finished difference Result 280 states and 330 transitions. [2021-01-06 10:14:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:14:41,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 163 [2021-01-06 10:14:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:41,713 INFO L225 Difference]: With dead ends: 280 [2021-01-06 10:14:41,713 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 10:14:41,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:14:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 10:14:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-01-06 10:14:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 10:14:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2021-01-06 10:14:41,719 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 163 [2021-01-06 10:14:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:41,719 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2021-01-06 10:14:41,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:14:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2021-01-06 10:14:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-01-06 10:14:41,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:41,721 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:41,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:14:41,935 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1755110488, now seen corresponding path program 26 times [2021-01-06 10:14:41,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:41,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766991528] [2021-01-06 10:14:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:42,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766991528] [2021-01-06 10:14:42,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667192760] [2021-01-06 10:14:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:42,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:14:42,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:42,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:14:42,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:42,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:42,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:14:42,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588878706] [2021-01-06 10:14:42,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:14:42,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:42,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:14:42,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:14:42,777 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand 29 states. [2021-01-06 10:14:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:42,872 INFO L93 Difference]: Finished difference Result 282 states and 332 transitions. [2021-01-06 10:14:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:14:42,873 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 165 [2021-01-06 10:14:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:42,874 INFO L225 Difference]: With dead ends: 282 [2021-01-06 10:14:42,874 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:14:42,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:14:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:14:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-01-06 10:14:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 10:14:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2021-01-06 10:14:42,880 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 165 [2021-01-06 10:14:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:42,881 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2021-01-06 10:14:42,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:14:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2021-01-06 10:14:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-01-06 10:14:42,883 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:42,883 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:43,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:43,097 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:43,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:43,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1389905894, now seen corresponding path program 27 times [2021-01-06 10:14:43,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:43,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291479913] [2021-01-06 10:14:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:43,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291479913] [2021-01-06 10:14:43,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630551093] [2021-01-06 10:14:43,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:43,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 10:14:43,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:43,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:14:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:44,115 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 10:14:44,116 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:44,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:14:44,123 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:14:44,123 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 10:14:44,423 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:14:44,424 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-01-06 10:14:44,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:44,434 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:14:44,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:14:44,436 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:18 [2021-01-06 10:14:44,616 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:14:44,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-01-06 10:14:44,618 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:14:44,620 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:14:44,621 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:14:44,621 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-01-06 10:14:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 34 proven. 38 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-01-06 10:14:44,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:44,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14] total 41 [2021-01-06 10:14:44,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445960015] [2021-01-06 10:14:44,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:14:44,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:44,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:14:44,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:14:44,748 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand 41 states. [2021-01-06 10:14:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:46,849 INFO L93 Difference]: Finished difference Result 387 states and 459 transitions. [2021-01-06 10:14:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:14:46,852 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 167 [2021-01-06 10:14:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:46,853 INFO L225 Difference]: With dead ends: 387 [2021-01-06 10:14:46,854 INFO L226 Difference]: Without dead ends: 274 [2021-01-06 10:14:46,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1297, Invalid=4253, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 10:14:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-01-06 10:14:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 205. [2021-01-06 10:14:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 10:14:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 238 transitions. [2021-01-06 10:14:46,867 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 238 transitions. Word has length 167 [2021-01-06 10:14:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:46,867 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 238 transitions. [2021-01-06 10:14:46,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:14:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 238 transitions. [2021-01-06 10:14:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 10:14:46,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:46,869 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:47,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 10:14:47,083 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:47,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1827777062, now seen corresponding path program 1 times [2021-01-06 10:14:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:47,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062513483] [2021-01-06 10:14:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:47,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062513483] [2021-01-06 10:14:47,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718752878] [2021-01-06 10:14:47,685 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 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 [2021-01-06 10:14:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:47,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:14:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:48,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:48,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 10:14:48,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409339577] [2021-01-06 10:14:48,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:14:48,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:14:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:14:48,024 INFO L87 Difference]: Start difference. First operand 205 states and 238 transitions. Second operand 31 states. [2021-01-06 10:14:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:48,123 INFO L93 Difference]: Finished difference Result 356 states and 422 transitions. [2021-01-06 10:14:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:14:48,124 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2021-01-06 10:14:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:48,125 INFO L225 Difference]: With dead ends: 356 [2021-01-06 10:14:48,125 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 10:14:48,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:14:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 10:14:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-01-06 10:14:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 10:14:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2021-01-06 10:14:48,134 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 169 [2021-01-06 10:14:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:48,135 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2021-01-06 10:14:48,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:14:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2021-01-06 10:14:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 10:14:48,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:48,136 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:48,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:48,350 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:48,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1688108900, now seen corresponding path program 2 times [2021-01-06 10:14:48,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:48,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080969543] [2021-01-06 10:14:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:48,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080969543] [2021-01-06 10:14:48,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89490483] [2021-01-06 10:14:48,993 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 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 [2021-01-06 10:14:49,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:14:49,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:14:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:49,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:49,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 10:14:49,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277027762] [2021-01-06 10:14:49,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:14:49,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:14:49,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:14:49,334 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand 32 states. [2021-01-06 10:14:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:49,443 INFO L93 Difference]: Finished difference Result 358 states and 424 transitions. [2021-01-06 10:14:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:14:49,443 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2021-01-06 10:14:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:49,445 INFO L225 Difference]: With dead ends: 358 [2021-01-06 10:14:49,445 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 10:14:49,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:14:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 10:14:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-01-06 10:14:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 10:14:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 242 transitions. [2021-01-06 10:14:49,454 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 242 transitions. Word has length 171 [2021-01-06 10:14:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:49,454 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 242 transitions. [2021-01-06 10:14:49,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:14:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 242 transitions. [2021-01-06 10:14:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:14:49,455 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:49,456 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:49,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:14:49,669 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:49,670 INFO L82 PathProgramCache]: Analyzing trace with hash 610991394, now seen corresponding path program 3 times [2021-01-06 10:14:49,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:49,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883963791] [2021-01-06 10:14:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-01-06 10:14:50,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883963791] [2021-01-06 10:14:50,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326581957] [2021-01-06 10:14:50,315 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 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 [2021-01-06 10:14:50,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:14:50,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:14:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1114 trivial. 0 not checked. [2021-01-06 10:14:51,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:51,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2021-01-06 10:14:51,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579434784] [2021-01-06 10:14:51,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:14:51,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:51,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:14:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:14:51,145 INFO L87 Difference]: Start difference. First operand 209 states and 242 transitions. Second operand 40 states. [2021-01-06 10:14:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:51,356 INFO L93 Difference]: Finished difference Result 363 states and 430 transitions. [2021-01-06 10:14:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:14:51,357 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 173 [2021-01-06 10:14:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:51,359 INFO L225 Difference]: With dead ends: 363 [2021-01-06 10:14:51,359 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 10:14:51,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:14:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 10:14:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-01-06 10:14:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-01-06 10:14:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 246 transitions. [2021-01-06 10:14:51,369 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 246 transitions. Word has length 173 [2021-01-06 10:14:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:51,370 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 246 transitions. [2021-01-06 10:14:51,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:14:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 246 transitions. [2021-01-06 10:14:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-01-06 10:14:51,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:51,371 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:51,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:14:51,585 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:51,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2116474334, now seen corresponding path program 4 times [2021-01-06 10:14:51,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:51,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46770359] [2021-01-06 10:14:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-01-06 10:14:52,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46770359] [2021-01-06 10:14:52,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476332677] [2021-01-06 10:14:52,297 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 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 [2021-01-06 10:14:52,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:14:52,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:14:52,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:14:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-01-06 10:14:52,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:14:52,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:14:52,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581432221] [2021-01-06 10:14:52,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:14:52,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:14:52,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:14:52,633 INFO L87 Difference]: Start difference. First operand 213 states and 246 transitions. Second operand 34 states. [2021-01-06 10:14:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:52,758 INFO L93 Difference]: Finished difference Result 366 states and 432 transitions. [2021-01-06 10:14:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:14:52,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 177 [2021-01-06 10:14:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:52,760 INFO L225 Difference]: With dead ends: 366 [2021-01-06 10:14:52,760 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 10:14:52,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:14:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 10:14:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-01-06 10:14:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2021-01-06 10:14:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 248 transitions. [2021-01-06 10:14:52,769 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 248 transitions. Word has length 177 [2021-01-06 10:14:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:52,769 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 248 transitions. [2021-01-06 10:14:52,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:14:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 248 transitions. [2021-01-06 10:14:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-01-06 10:14:52,771 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:52,771 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:52,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:14:52,985 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:52,986 INFO L82 PathProgramCache]: Analyzing trace with hash -490631908, now seen corresponding path program 5 times [2021-01-06 10:14:52,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:52,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745570708] [2021-01-06 10:14:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-01-06 10:14:53,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745570708] [2021-01-06 10:14:53,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183851012] [2021-01-06 10:14:53,726 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 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 [2021-01-06 10:15:25,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-01-06 10:15:25,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:25,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2021-01-06 10:15:25,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:25,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 10] total 42 [2021-01-06 10:15:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376267585] [2021-01-06 10:15:25,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:15:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:25,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:15:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=1117, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:15:25,585 INFO L87 Difference]: Start difference. First operand 215 states and 248 transitions. Second operand 42 states. [2021-01-06 10:15:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:25,999 INFO L93 Difference]: Finished difference Result 396 states and 474 transitions. [2021-01-06 10:15:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:15:25,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 179 [2021-01-06 10:15:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:26,001 INFO L225 Difference]: With dead ends: 396 [2021-01-06 10:15:26,001 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 10:15:26,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1117, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:15:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 10:15:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 233. [2021-01-06 10:15:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2021-01-06 10:15:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 270 transitions. [2021-01-06 10:15:26,011 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 270 transitions. Word has length 179 [2021-01-06 10:15:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:26,011 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 270 transitions. [2021-01-06 10:15:26,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:15:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 270 transitions. [2021-01-06 10:15:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-01-06 10:15:26,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:26,013 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:26,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:15:26,214 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:26,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1882803339, now seen corresponding path program 6 times [2021-01-06 10:15:26,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:26,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025065476] [2021-01-06 10:15:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-01-06 10:15:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025065476] [2021-01-06 10:15:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260542604] [2021-01-06 10:15:26,988 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 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 [2021-01-06 10:15:28,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:15:28,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:15:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2021-01-06 10:15:29,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:29,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2021-01-06 10:15:29,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765214520] [2021-01-06 10:15:29,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:15:29,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:29,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:15:29,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:15:29,268 INFO L87 Difference]: Start difference. First operand 233 states and 270 transitions. Second operand 44 states. [2021-01-06 10:15:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:29,704 INFO L93 Difference]: Finished difference Result 430 states and 516 transitions. [2021-01-06 10:15:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:15:29,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 193 [2021-01-06 10:15:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:29,706 INFO L225 Difference]: With dead ends: 430 [2021-01-06 10:15:29,706 INFO L226 Difference]: Without dead ends: 264 [2021-01-06 10:15:29,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:15:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-01-06 10:15:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 251. [2021-01-06 10:15:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2021-01-06 10:15:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 292 transitions. [2021-01-06 10:15:29,715 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 292 transitions. Word has length 193 [2021-01-06 10:15:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:29,715 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 292 transitions. [2021-01-06 10:15:29,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:15:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 292 transitions. [2021-01-06 10:15:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-01-06 10:15:29,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:29,717 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:29,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:15:29,929 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1473902542, now seen corresponding path program 7 times [2021-01-06 10:15:29,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:29,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990772883] [2021-01-06 10:15:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-01-06 10:15:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990772883] [2021-01-06 10:15:30,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666116672] [2021-01-06 10:15:30,757 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 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 [2021-01-06 10:15:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:15:30,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-01-06 10:15:31,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:31,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 10:15:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792463464] [2021-01-06 10:15:31,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:15:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:15:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:15:31,147 INFO L87 Difference]: Start difference. First operand 251 states and 292 transitions. Second operand 37 states. [2021-01-06 10:15:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:31,280 INFO L93 Difference]: Finished difference Result 436 states and 518 transitions. [2021-01-06 10:15:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:15:31,280 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 207 [2021-01-06 10:15:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:31,282 INFO L225 Difference]: With dead ends: 436 [2021-01-06 10:15:31,282 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 10:15:31,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:15:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 10:15:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-01-06 10:15:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2021-01-06 10:15:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 294 transitions. [2021-01-06 10:15:31,291 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 294 transitions. Word has length 207 [2021-01-06 10:15:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:31,291 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 294 transitions. [2021-01-06 10:15:31,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:15:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 294 transitions. [2021-01-06 10:15:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-01-06 10:15:31,292 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:31,293 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:31,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:15:31,507 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1434784116, now seen corresponding path program 8 times [2021-01-06 10:15:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:31,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268900512] [2021-01-06 10:15:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-01-06 10:15:32,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268900512] [2021-01-06 10:15:32,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656965126] [2021-01-06 10:15:32,321 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 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 [2021-01-06 10:15:32,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:32,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:15:32,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-01-06 10:15:32,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:32,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 10:15:32,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757915119] [2021-01-06 10:15:32,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 10:15:32,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 10:15:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:15:32,708 INFO L87 Difference]: Start difference. First operand 253 states and 294 transitions. Second operand 38 states. [2021-01-06 10:15:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:32,829 INFO L93 Difference]: Finished difference Result 438 states and 520 transitions. [2021-01-06 10:15:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:15:32,829 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2021-01-06 10:15:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:32,831 INFO L225 Difference]: With dead ends: 438 [2021-01-06 10:15:32,831 INFO L226 Difference]: Without dead ends: 256 [2021-01-06 10:15:32,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 10:15:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-01-06 10:15:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-01-06 10:15:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2021-01-06 10:15:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 296 transitions. [2021-01-06 10:15:32,849 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 296 transitions. Word has length 209 [2021-01-06 10:15:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:32,849 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 296 transitions. [2021-01-06 10:15:32,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 10:15:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 296 transitions. [2021-01-06 10:15:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-01-06 10:15:32,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:32,851 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:33,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:15:33,065 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:33,066 INFO L82 PathProgramCache]: Analyzing trace with hash -658952758, now seen corresponding path program 9 times [2021-01-06 10:15:33,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:33,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904885023] [2021-01-06 10:15:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-01-06 10:15:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904885023] [2021-01-06 10:15:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15963993] [2021-01-06 10:15:33,975 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 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 [2021-01-06 10:15:34,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 10:15:34,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:15:34,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1684 trivial. 0 not checked. [2021-01-06 10:15:34,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:34,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 11] total 47 [2021-01-06 10:15:34,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978146667] [2021-01-06 10:15:34,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:15:34,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:34,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:15:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:15:34,918 INFO L87 Difference]: Start difference. First operand 255 states and 296 transitions. Second operand 47 states. [2021-01-06 10:15:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:35,111 INFO L93 Difference]: Finished difference Result 443 states and 526 transitions. [2021-01-06 10:15:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:15:35,111 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 211 [2021-01-06 10:15:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:35,113 INFO L225 Difference]: With dead ends: 443 [2021-01-06 10:15:35,113 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 10:15:35,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:15:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 10:15:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2021-01-06 10:15:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2021-01-06 10:15:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2021-01-06 10:15:35,123 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 211 [2021-01-06 10:15:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:35,124 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2021-01-06 10:15:35,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:15:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2021-01-06 10:15:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-01-06 10:15:35,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:35,126 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:35,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:15:35,338 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:35,339 INFO L82 PathProgramCache]: Analyzing trace with hash -409852538, now seen corresponding path program 10 times [2021-01-06 10:15:35,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:35,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527433715] [2021-01-06 10:15:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-01-06 10:15:36,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527433715] [2021-01-06 10:15:36,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492171298] [2021-01-06 10:15:36,314 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 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 [2021-01-06 10:15:36,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:36,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:15:36,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-01-06 10:15:36,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:36,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:15:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28267492] [2021-01-06 10:15:36,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:15:36,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:15:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:15:36,717 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand 40 states. [2021-01-06 10:15:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:36,854 INFO L93 Difference]: Finished difference Result 446 states and 528 transitions. [2021-01-06 10:15:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:15:36,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 215 [2021-01-06 10:15:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:36,856 INFO L225 Difference]: With dead ends: 446 [2021-01-06 10:15:36,857 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 10:15:36,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:15:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 10:15:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-01-06 10:15:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2021-01-06 10:15:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 302 transitions. [2021-01-06 10:15:36,866 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 302 transitions. Word has length 215 [2021-01-06 10:15:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:36,867 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 302 transitions. [2021-01-06 10:15:36,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:15:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 302 transitions. [2021-01-06 10:15:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-01-06 10:15:36,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:36,868 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:37,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:37,081 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1739030084, now seen corresponding path program 11 times [2021-01-06 10:15:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:37,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301709182] [2021-01-06 10:15:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-01-06 10:15:38,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301709182] [2021-01-06 10:15:38,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149897003] [2021-01-06 10:15:38,078 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 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 [2021-01-06 10:16:35,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2021-01-06 10:16:35,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:35,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:16:35,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-01-06 10:16:35,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:35,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:16:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945823932] [2021-01-06 10:16:35,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:16:35,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:35,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:16:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:16:35,991 INFO L87 Difference]: Start difference. First operand 261 states and 302 transitions. Second operand 41 states. [2021-01-06 10:16:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:36,152 INFO L93 Difference]: Finished difference Result 448 states and 530 transitions. [2021-01-06 10:16:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:16:36,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 217 [2021-01-06 10:16:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:36,158 INFO L225 Difference]: With dead ends: 448 [2021-01-06 10:16:36,158 INFO L226 Difference]: Without dead ends: 264 [2021-01-06 10:16:36,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:16:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-01-06 10:16:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-01-06 10:16:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2021-01-06 10:16:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 304 transitions. [2021-01-06 10:16:36,167 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 304 transitions. Word has length 217 [2021-01-06 10:16:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:36,168 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 304 transitions. [2021-01-06 10:16:36,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:16:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 304 transitions. [2021-01-06 10:16:36,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-01-06 10:16:36,169 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:36,169 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:36,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:36,383 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:36,384 INFO L82 PathProgramCache]: Analyzing trace with hash 935960450, now seen corresponding path program 12 times [2021-01-06 10:16:36,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:36,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469477974] [2021-01-06 10:16:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-01-06 10:16:37,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469477974] [2021-01-06 10:16:37,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746404119] [2021-01-06 10:16:37,417 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 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 [2021-01-06 10:16:38,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:16:38,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:16:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1831 trivial. 0 not checked. [2021-01-06 10:16:39,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:39,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 12] total 51 [2021-01-06 10:16:39,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485277512] [2021-01-06 10:16:39,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 10:16:39,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:39,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 10:16:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:16:39,370 INFO L87 Difference]: Start difference. First operand 263 states and 304 transitions. Second operand 51 states. [2021-01-06 10:16:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:39,942 INFO L93 Difference]: Finished difference Result 478 states and 572 transitions. [2021-01-06 10:16:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 10:16:39,942 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 219 [2021-01-06 10:16:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:39,944 INFO L225 Difference]: With dead ends: 478 [2021-01-06 10:16:39,944 INFO L226 Difference]: Without dead ends: 294 [2021-01-06 10:16:39,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 10:16:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-01-06 10:16:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 281. [2021-01-06 10:16:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2021-01-06 10:16:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 326 transitions. [2021-01-06 10:16:39,954 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 326 transitions. Word has length 219 [2021-01-06 10:16:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:39,954 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 326 transitions. [2021-01-06 10:16:39,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 10:16:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 326 transitions. [2021-01-06 10:16:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-01-06 10:16:39,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:39,956 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:40,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 10:16:40,170 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash 203381979, now seen corresponding path program 13 times [2021-01-06 10:16:40,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:40,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740216638] [2021-01-06 10:16:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-06 10:16:41,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740216638] [2021-01-06 10:16:41,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461692946] [2021-01-06 10:16:41,273 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 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 [2021-01-06 10:16:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:16:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-01-06 10:16:41,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:41,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 10:16:41,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046650233] [2021-01-06 10:16:41,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 10:16:41,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 10:16:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:16:41,687 INFO L87 Difference]: Start difference. First operand 281 states and 326 transitions. Second operand 43 states. [2021-01-06 10:16:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:41,856 INFO L93 Difference]: Finished difference Result 483 states and 573 transitions. [2021-01-06 10:16:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:16:41,857 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 233 [2021-01-06 10:16:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:41,858 INFO L225 Difference]: With dead ends: 483 [2021-01-06 10:16:41,858 INFO L226 Difference]: Without dead ends: 283 [2021-01-06 10:16:41,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:16:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-01-06 10:16:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-01-06 10:16:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2021-01-06 10:16:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 328 transitions. [2021-01-06 10:16:41,868 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 328 transitions. Word has length 233 [2021-01-06 10:16:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:41,868 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 328 transitions. [2021-01-06 10:16:41,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 10:16:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 328 transitions. [2021-01-06 10:16:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-01-06 10:16:41,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:41,870 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:42,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:42,086 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:42,087 INFO L82 PathProgramCache]: Analyzing trace with hash -956087783, now seen corresponding path program 14 times [2021-01-06 10:16:42,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:42,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055632765] [2021-01-06 10:16:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2021-01-06 10:16:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055632765] [2021-01-06 10:16:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358217616] [2021-01-06 10:16:42,338 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:42,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:16:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:16:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2021-01-06 10:16:42,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:42,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:16:42,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039000524] [2021-01-06 10:16:42,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:16:42,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:16:42,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:16:42,752 INFO L87 Difference]: Start difference. First operand 283 states and 328 transitions. Second operand 14 states. [2021-01-06 10:16:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:42,946 INFO L93 Difference]: Finished difference Result 430 states and 510 transitions. [2021-01-06 10:16:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:16:42,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 235 [2021-01-06 10:16:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:42,949 INFO L225 Difference]: With dead ends: 430 [2021-01-06 10:16:42,949 INFO L226 Difference]: Without dead ends: 311 [2021-01-06 10:16:42,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:16:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-01-06 10:16:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2021-01-06 10:16:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2021-01-06 10:16:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 348 transitions. [2021-01-06 10:16:42,959 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 348 transitions. Word has length 235 [2021-01-06 10:16:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:42,960 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 348 transitions. [2021-01-06 10:16:42,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:16:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 348 transitions. [2021-01-06 10:16:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-01-06 10:16:42,962 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:42,962 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:43,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:43,177 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash 388823092, now seen corresponding path program 15 times [2021-01-06 10:16:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:43,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597084934] [2021-01-06 10:16:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 2143 trivial. 0 not checked. [2021-01-06 10:16:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597084934] [2021-01-06 10:16:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385716890] [2021-01-06 10:16:43,430 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:44,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:16:44,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:16:44,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2293 trivial. 0 not checked. [2021-01-06 10:16:44,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:44,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-01-06 10:16:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607090104] [2021-01-06 10:16:44,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:16:44,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:16:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:16:44,891 INFO L87 Difference]: Start difference. First operand 299 states and 348 transitions. Second operand 24 states. [2021-01-06 10:16:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:45,182 INFO L93 Difference]: Finished difference Result 457 states and 544 transitions. [2021-01-06 10:16:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:16:45,183 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 247 [2021-01-06 10:16:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:45,185 INFO L225 Difference]: With dead ends: 457 [2021-01-06 10:16:45,185 INFO L226 Difference]: Without dead ends: 330 [2021-01-06 10:16:45,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:16:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-01-06 10:16:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 317. [2021-01-06 10:16:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2021-01-06 10:16:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 370 transitions. [2021-01-06 10:16:45,196 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 370 transitions. Word has length 247 [2021-01-06 10:16:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:45,197 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 370 transitions. [2021-01-06 10:16:45,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:16:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 370 transitions. [2021-01-06 10:16:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-01-06 10:16:45,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:45,199 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:45,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 10:16:45,413 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1410638669, now seen corresponding path program 16 times [2021-01-06 10:16:45,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:45,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931096796] [2021-01-06 10:16:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2021-01-06 10:16:45,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931096796] [2021-01-06 10:16:45,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949456421] [2021-01-06 10:16:45,681 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:45,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:16:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:16:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2021-01-06 10:16:46,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:16:46,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:16:46,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984028846] [2021-01-06 10:16:46,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:16:46,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:46,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:16:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:16:46,249 INFO L87 Difference]: Start difference. First operand 317 states and 370 transitions. Second operand 16 states. [2021-01-06 10:16:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:46,480 INFO L93 Difference]: Finished difference Result 482 states and 574 transitions. [2021-01-06 10:16:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:16:46,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 261 [2021-01-06 10:16:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:46,485 INFO L225 Difference]: With dead ends: 482 [2021-01-06 10:16:46,485 INFO L226 Difference]: Without dead ends: 345 [2021-01-06 10:16:46,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:16:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-01-06 10:16:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 333. [2021-01-06 10:16:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2021-01-06 10:16:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 390 transitions. [2021-01-06 10:16:46,496 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 390 transitions. Word has length 261 [2021-01-06 10:16:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:46,496 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 390 transitions. [2021-01-06 10:16:46,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:16:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 390 transitions. [2021-01-06 10:16:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-01-06 10:16:46,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:46,498 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:46,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 10:16:46,714 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash -556367512, now seen corresponding path program 17 times [2021-01-06 10:16:46,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:46,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374821855] [2021-01-06 10:16:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2350 trivial. 0 not checked. [2021-01-06 10:16:47,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374821855] [2021-01-06 10:16:47,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038471325] [2021-01-06 10:16:47,022 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true