/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:09,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:09,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:09,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 09:42:09,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:09,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:09,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:09,189 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 09:42:09,218 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:09,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:09,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:09,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:09,221 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:09,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:09,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:09,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:09,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:09,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:09,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:09,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:09,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:09,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:09,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:09,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:09,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:09,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:09,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:09,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:09,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:09,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:09,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:09,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:09,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:09,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:09,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:09,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:09,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:09,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:09,750 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:09,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2021-01-06 09:42:09,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3f357f322/8ad5d9f6b115463181c2b6bafcc72ab2/FLAG16e651253 [2021-01-06 09:42:10,507 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:10,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2021-01-06 09:42:10,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3f357f322/8ad5d9f6b115463181c2b6bafcc72ab2/FLAG16e651253 [2021-01-06 09:42:10,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3f357f322/8ad5d9f6b115463181c2b6bafcc72ab2 [2021-01-06 09:42:10,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:10,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:10,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:10,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:10,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:10,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@469e5a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:10, skipping insertion in model container [2021-01-06 09:42:10,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:10" (1/1) ... [2021-01-06 09:42:10,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:10,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:11,101 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:11,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:11,135 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:11,150 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:11,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:11,177 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:11,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11 WrapperNode [2021-01-06 09:42:11,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:11,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:11,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:11,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:11,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:11,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:11,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:11,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:11,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (1/1) ... [2021-01-06 09:42:11,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:11,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:11,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:11,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:11,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (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 09:42:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:11,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:11,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:11,654 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:42:11,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:11 BoogieIcfgContainer [2021-01-06 09:42:11,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:11,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:11,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:11,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:11,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:10" (1/3) ... [2021-01-06 09:42:11,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df739f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:11, skipping insertion in model container [2021-01-06 09:42:11,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:11" (2/3) ... [2021-01-06 09:42:11,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df739f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:11, skipping insertion in model container [2021-01-06 09:42:11,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:11" (3/3) ... [2021-01-06 09:42:11,667 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2021-01-06 09:42:11,677 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:11,684 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:11,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:11,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:11,749 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:11,749 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:11,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:11,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:11,750 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:11,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:11,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 09:42:11,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:42:11,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:11,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:11,809 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-01-06 09:42:11,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:11,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558581943] [2021-01-06 09:42:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:12,100 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 09:42:12,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558581943] [2021-01-06 09:42:12,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:12,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:12,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470215062] [2021-01-06 09:42:12,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:12,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:12,140 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 09:42:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:12,216 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 09:42:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:12,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:42:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:12,240 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:42:12,240 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 09:42:12,245 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 09:42:12,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 09:42:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 09:42:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 09:42:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 09:42:12,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-01-06 09:42:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:12,292 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 09:42:12,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 09:42:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:42:12,294 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:12,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:12,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:12,296 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2021-01-06 09:42:12,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:12,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087662087] [2021-01-06 09:42:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:12,414 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 09:42:12,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087662087] [2021-01-06 09:42:12,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623102487] [2021-01-06 09:42:12,415 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 09:42:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:12,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:12,547 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 09:42:12,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:12,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:12,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807530695] [2021-01-06 09:42:12,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:12,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:12,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:12,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:12,552 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2021-01-06 09:42:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:12,569 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-01-06 09:42:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:12,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:42:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:12,570 INFO L225 Difference]: With dead ends: 24 [2021-01-06 09:42:12,570 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 09:42:12,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 09:42:12,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 09:42:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-01-06 09:42:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 09:42:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 09:42:12,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-01-06 09:42:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:12,577 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 09:42:12,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 09:42:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 09:42:12,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:12,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:12,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:12,792 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-01-06 09:42:12,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:12,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653791466] [2021-01-06 09:42:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:12,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653791466] [2021-01-06 09:42:12,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85312726] [2021-01-06 09:42:12,841 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 09:42:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:12,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:12,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:12,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:12,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869033981] [2021-01-06 09:42:12,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:12,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:12,974 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-01-06 09:42:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:13,002 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-01-06 09:42:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:13,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 09:42:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:13,004 INFO L225 Difference]: With dead ends: 30 [2021-01-06 09:42:13,004 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 09:42:13,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 09:42:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 09:42:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 09:42:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 09:42:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 09:42:13,011 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-01-06 09:42:13,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:13,011 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 09:42:13,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:13,011 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 09:42:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:42:13,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:13,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:13,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:13,227 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash -628241457, now seen corresponding path program 2 times [2021-01-06 09:42:13,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:13,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077618146] [2021-01-06 09:42:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:13,300 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 09:42:13,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077618146] [2021-01-06 09:42:13,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954864514] [2021-01-06 09:42:13,301 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 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 09:42:13,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:13,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:13,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:42:13,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117500307] [2021-01-06 09:42:13,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:42:13,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:42:13,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:13,469 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2021-01-06 09:42:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:13,517 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-01-06 09:42:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:42:13,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 09:42:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:13,518 INFO L225 Difference]: With dead ends: 35 [2021-01-06 09:42:13,518 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 09:42:13,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 09:42:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 09:42:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-01-06 09:42:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 09:42:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 09:42:13,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2021-01-06 09:42:13,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:13,525 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 09:42:13,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:42:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 09:42:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:42:13,526 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:13,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:13,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:13,742 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1927655819, now seen corresponding path program 3 times [2021-01-06 09:42:13,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:13,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745774441] [2021-01-06 09:42:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:42:13,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745774441] [2021-01-06 09:42:13,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292496675] [2021-01-06 09:42:13,819 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 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 09:42:13,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:42:13,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:13,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 09:42:13,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403334385] [2021-01-06 09:42:13,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:42:13,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:42:13,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:13,968 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2021-01-06 09:42:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:14,045 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 09:42:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:42:14,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2021-01-06 09:42:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:14,049 INFO L225 Difference]: With dead ends: 41 [2021-01-06 09:42:14,052 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:42:14,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:42:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-01-06 09:42:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:42:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 09:42:14,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2021-01-06 09:42:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:14,071 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 09:42:14,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:42:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 09:42:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:42:14,072 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:14,072 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:14,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:14,291 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1088075449, now seen corresponding path program 4 times [2021-01-06 09:42:14,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:14,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940124948] [2021-01-06 09:42:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:42:14,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940124948] [2021-01-06 09:42:14,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550487175] [2021-01-06 09:42:14,383 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 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 09:42:14,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:14,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:14,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:42:14,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:14,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 09:42:14,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206790833] [2021-01-06 09:42:14,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:14,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:14,513 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2021-01-06 09:42:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:14,570 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-01-06 09:42:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:42:14,571 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 09:42:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:14,572 INFO L225 Difference]: With dead ends: 47 [2021-01-06 09:42:14,572 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:42:14,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:42:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-01-06 09:42:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 09:42:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 09:42:14,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2021-01-06 09:42:14,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:14,580 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 09:42:14,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 09:42:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:42:14,581 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:14,581 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:14,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:42:14,797 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:14,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash -509111549, now seen corresponding path program 5 times [2021-01-06 09:42:14,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:14,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125149733] [2021-01-06 09:42:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:42:14,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125149733] [2021-01-06 09:42:14,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612695758] [2021-01-06 09:42:14,935 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 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 09:42:15,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:42:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:15,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:42:15,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:15,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-01-06 09:42:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617989793] [2021-01-06 09:42:15,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:42:15,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:42:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:15,217 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2021-01-06 09:42:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:15,304 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-01-06 09:42:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:42:15,305 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2021-01-06 09:42:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:15,306 INFO L225 Difference]: With dead ends: 53 [2021-01-06 09:42:15,306 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:42:15,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:42:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-01-06 09:42:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:42:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 09:42:15,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2021-01-06 09:42:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:15,313 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 09:42:15,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:42:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 09:42:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:42:15,315 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:15,315 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:15,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:15,531 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 105352895, now seen corresponding path program 6 times [2021-01-06 09:42:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:15,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768558169] [2021-01-06 09:42:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:42:15,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768558169] [2021-01-06 09:42:15,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093836284] [2021-01-06 09:42:15,639 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 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 09:42:15,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:42:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:42:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:15,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:15,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-01-06 09:42:15,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546646326] [2021-01-06 09:42:15,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:42:15,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:15,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:42:15,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:15,875 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2021-01-06 09:42:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:15,980 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-01-06 09:42:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:42:15,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2021-01-06 09:42:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:15,982 INFO L225 Difference]: With dead ends: 59 [2021-01-06 09:42:15,982 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:42:15,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:42:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-01-06 09:42:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:42:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 09:42:15,989 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2021-01-06 09:42:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:15,989 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 09:42:15,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:42:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 09:42:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:42:15,991 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:15,991 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:16,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:16,207 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash -497009541, now seen corresponding path program 7 times [2021-01-06 09:42:16,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:16,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053117798] [2021-01-06 09:42:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:16,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053117798] [2021-01-06 09:42:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388764063] [2021-01-06 09:42:16,418 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 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 09:42:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:16,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:16,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:16,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:42:16,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333070902] [2021-01-06 09:42:16,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:16,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:16,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:16,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:16,557 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 11 states. [2021-01-06 09:42:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:16,608 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-01-06 09:42:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:16,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 09:42:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:16,610 INFO L225 Difference]: With dead ends: 62 [2021-01-06 09:42:16,610 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:42:16,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 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 09:42:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:42:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-01-06 09:42:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:42:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 09:42:16,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2021-01-06 09:42:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:16,617 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 09:42:16,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 09:42:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:42:16,619 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:16,619 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:16,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:42:16,834 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:16,835 INFO L82 PathProgramCache]: Analyzing trace with hash 531052601, now seen corresponding path program 8 times [2021-01-06 09:42:16,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:16,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235931909] [2021-01-06 09:42:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:16,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235931909] [2021-01-06 09:42:16,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898081747] [2021-01-06 09:42:16,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:17,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:17,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:42:17,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:17,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:17,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:42:17,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520275675] [2021-01-06 09:42:17,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:42:17,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:17,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:42:17,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:17,109 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2021-01-06 09:42:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:17,153 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-01-06 09:42:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:42:17,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2021-01-06 09:42:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:17,155 INFO L225 Difference]: With dead ends: 64 [2021-01-06 09:42:17,155 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:42:17,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:42:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 09:42:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 09:42:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 09:42:17,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2021-01-06 09:42:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:17,162 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 09:42:17,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:42:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 09:42:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 09:42:17,164 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:17,164 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:17,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:17,378 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:17,379 INFO L82 PathProgramCache]: Analyzing trace with hash 656292983, now seen corresponding path program 9 times [2021-01-06 09:42:17,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:17,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496769037] [2021-01-06 09:42:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:42:17,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496769037] [2021-01-06 09:42:17,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850679800] [2021-01-06 09:42:17,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:17,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:42:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:42:17,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:17,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:17,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-01-06 09:42:17,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729778791] [2021-01-06 09:42:17,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:42:17,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:17,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:42:17,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:17,851 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 19 states. [2021-01-06 09:42:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:17,931 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-01-06 09:42:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:42:17,931 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2021-01-06 09:42:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:17,932 INFO L225 Difference]: With dead ends: 69 [2021-01-06 09:42:17,932 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:42:17,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:42:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-01-06 09:42:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:42:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 09:42:17,939 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2021-01-06 09:42:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:17,939 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 09:42:17,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:42:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 09:42:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:42:17,940 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:17,941 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:18,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:18,154 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash -363708877, now seen corresponding path program 10 times [2021-01-06 09:42:18,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:18,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019728049] [2021-01-06 09:42:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 09:42:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019728049] [2021-01-06 09:42:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975389245] [2021-01-06 09:42:18,350 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 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 09:42:18,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:18,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:18,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:18,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:18,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-01-06 09:42:18,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89881785] [2021-01-06 09:42:18,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:42:18,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:42:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:18,616 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 21 states. [2021-01-06 09:42:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:18,721 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-01-06 09:42:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:42:18,721 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2021-01-06 09:42:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:18,722 INFO L225 Difference]: With dead ends: 75 [2021-01-06 09:42:18,722 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:42:18,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:42:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-01-06 09:42:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 09:42:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-01-06 09:42:18,729 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2021-01-06 09:42:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:18,729 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-01-06 09:42:18,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:42:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-01-06 09:42:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 09:42:18,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:18,730 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:18,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:42:18,945 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1684803089, now seen corresponding path program 11 times [2021-01-06 09:42:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:18,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302004459] [2021-01-06 09:42:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:19,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302004459] [2021-01-06 09:42:19,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755121230] [2021-01-06 09:42:19,100 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 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 09:42:19,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:42:19,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:42:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:19,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:19,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:42:19,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582339494] [2021-01-06 09:42:19,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:42:19,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:19,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:42:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:19,717 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2021-01-06 09:42:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:19,776 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-01-06 09:42:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:42:19,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2021-01-06 09:42:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:19,779 INFO L225 Difference]: With dead ends: 78 [2021-01-06 09:42:19,779 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 09:42:19,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 09:42:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-01-06 09:42:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:42:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 09:42:19,803 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2021-01-06 09:42:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:19,804 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 09:42:19,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:42:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 09:42:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:42:19,805 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:19,805 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:20,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:42:20,006 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:20,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1669775187, now seen corresponding path program 12 times [2021-01-06 09:42:20,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:20,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095807383] [2021-01-06 09:42:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:42:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095807383] [2021-01-06 09:42:20,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344745251] [2021-01-06 09:42:20,184 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 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 09:42:22,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:42:22,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:22,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:42:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:42:23,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:23,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-01-06 09:42:23,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052316753] [2021-01-06 09:42:23,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:42:23,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:42:23,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:23,135 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 24 states. [2021-01-06 09:42:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:23,250 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-01-06 09:42:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:42:23,250 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2021-01-06 09:42:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:23,251 INFO L225 Difference]: With dead ends: 83 [2021-01-06 09:42:23,251 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 09:42:23,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 09:42:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-01-06 09:42:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:42:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 09:42:23,257 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2021-01-06 09:42:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:23,258 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 09:42:23,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:42:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 09:42:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:42:23,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:23,259 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:23,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:42:23,473 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash 557979497, now seen corresponding path program 13 times [2021-01-06 09:42:23,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706647572] [2021-01-06 09:42:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:23,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706647572] [2021-01-06 09:42:23,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201069453] [2021-01-06 09:42:23,689 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 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 09:42:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:23,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:42:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:23,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:23,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:42:23,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703885037] [2021-01-06 09:42:23,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:42:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:42:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:42:23,848 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 17 states. [2021-01-06 09:42:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:23,923 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-01-06 09:42:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:42:23,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2021-01-06 09:42:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:23,924 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:42:23,924 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 09:42:23,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 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 09:42:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 09:42:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-01-06 09:42:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 09:42:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-01-06 09:42:23,930 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2021-01-06 09:42:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:23,931 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-01-06 09:42:23,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:42:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-01-06 09:42:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 09:42:23,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:23,932 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:24,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:24,149 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1957371993, now seen corresponding path program 14 times [2021-01-06 09:42:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:24,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770846539] [2021-01-06 09:42:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:24,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770846539] [2021-01-06 09:42:24,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472554202] [2021-01-06 09:42:24,350 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 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 09:42:24,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:42:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:24,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:24,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:42:24,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935370929] [2021-01-06 09:42:24,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:42:24,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:42:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:24,545 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 18 states. [2021-01-06 09:42:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:24,627 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-01-06 09:42:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:42:24,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2021-01-06 09:42:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:24,630 INFO L225 Difference]: With dead ends: 88 [2021-01-06 09:42:24,630 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:42:24,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:42:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-01-06 09:42:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 09:42:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 09:42:24,636 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2021-01-06 09:42:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:24,636 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 09:42:24,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:42:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 09:42:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:42:24,637 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:24,638 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:24,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:42:24,853 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:24,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1143566235, now seen corresponding path program 15 times [2021-01-06 09:42:24,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:24,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082432913] [2021-01-06 09:42:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:42:25,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082432913] [2021-01-06 09:42:25,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755089594] [2021-01-06 09:42:25,088 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 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 09:42:25,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 09:42:25,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:42:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:42:25,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:25,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-01-06 09:42:25,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956535710] [2021-01-06 09:42:25,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:42:25,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:42:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:42:25,760 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2021-01-06 09:42:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:25,928 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-01-06 09:42:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:42:25,929 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2021-01-06 09:42:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:25,930 INFO L225 Difference]: With dead ends: 93 [2021-01-06 09:42:25,930 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:42:25,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:42:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:42:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-01-06 09:42:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:42:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 09:42:25,936 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2021-01-06 09:42:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:25,936 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 09:42:25,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:42:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 09:42:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:42:25,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:25,937 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:26,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:42:26,151 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1160100641, now seen corresponding path program 16 times [2021-01-06 09:42:26,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579208661] [2021-01-06 09:42:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:26,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579208661] [2021-01-06 09:42:26,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837009884] [2021-01-06 09:42:26,426 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 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 09:42:26,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:26,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:42:26,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:26,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:26,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:42:26,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067961240] [2021-01-06 09:42:26,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:42:26,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:26,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:42:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:42:26,586 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2021-01-06 09:42:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:26,656 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-01-06 09:42:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:42:26,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2021-01-06 09:42:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:26,657 INFO L225 Difference]: With dead ends: 96 [2021-01-06 09:42:26,657 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:42:26,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 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 09:42:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:42:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 09:42:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 09:42:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 09:42:26,662 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2021-01-06 09:42:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:26,662 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 09:42:26,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:42:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 09:42:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:42:26,663 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:26,663 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:26,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:42:26,879 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash -595368609, now seen corresponding path program 17 times [2021-01-06 09:42:26,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564606302] [2021-01-06 09:42:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:27,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564606302] [2021-01-06 09:42:27,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157866679] [2021-01-06 09:42:27,199 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 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 09:42:29,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 09:42:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:29,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:42:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:29,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:29,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:42:29,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748385056] [2021-01-06 09:42:29,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:42:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:42:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:29,676 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 21 states. [2021-01-06 09:42:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:29,761 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-01-06 09:42:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:42:29,762 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2021-01-06 09:42:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:29,763 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:42:29,763 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 09:42:29,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:42:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 09:42:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 09:42:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 09:42:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-01-06 09:42:29,767 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2021-01-06 09:42:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:29,768 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-01-06 09:42:29,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:42:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-01-06 09:42:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 09:42:29,769 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:29,769 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:29,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:29,984 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash 320829469, now seen corresponding path program 18 times [2021-01-06 09:42:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:29,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039925705] [2021-01-06 09:42:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:30,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039925705] [2021-01-06 09:42:30,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342418686] [2021-01-06 09:42:30,290 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 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 09:42:46,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 09:42:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:46,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:42:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 09:42:46,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:46,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2021-01-06 09:42:46,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370169752] [2021-01-06 09:42:46,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:42:46,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:46,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:42:46,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:42:46,788 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 32 states. [2021-01-06 09:42:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:46,949 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-01-06 09:42:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 09:42:46,949 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2021-01-06 09:42:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:46,950 INFO L225 Difference]: With dead ends: 103 [2021-01-06 09:42:46,950 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 09:42:46,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2021-01-06 09:42:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 09:42:46,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-01-06 09:42:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:42:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-01-06 09:42:46,955 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2021-01-06 09:42:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:46,955 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-01-06 09:42:46,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 09:42:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-01-06 09:42:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:42:46,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:46,956 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:47,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:47,172 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1142098215, now seen corresponding path program 19 times [2021-01-06 09:42:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:47,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032338009] [2021-01-06 09:42:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:47,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032338009] [2021-01-06 09:42:47,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528199178] [2021-01-06 09:42:47,480 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 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 09:42:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:42:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:47,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:47,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:42:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841668298] [2021-01-06 09:42:47,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:42:47,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:42:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:42:47,652 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 23 states. [2021-01-06 09:42:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:47,748 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-01-06 09:42:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:42:47,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2021-01-06 09:42:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:47,750 INFO L225 Difference]: With dead ends: 106 [2021-01-06 09:42:47,750 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 09:42:47,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 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 09:42:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 09:42:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 09:42:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:42:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 09:42:47,754 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2021-01-06 09:42:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:47,754 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 09:42:47,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:42:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 09:42:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:42:47,755 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:47,755 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:47,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:42:47,969 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:47,970 INFO L82 PathProgramCache]: Analyzing trace with hash 9667351, now seen corresponding path program 20 times [2021-01-06 09:42:47,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:47,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438103658] [2021-01-06 09:42:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:48,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438103658] [2021-01-06 09:42:48,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867285939] [2021-01-06 09:42:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:48,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:42:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:48,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:48,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:42:48,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932937182] [2021-01-06 09:42:48,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:42:48,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:42:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:48,507 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 24 states. [2021-01-06 09:42:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:48,597 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-01-06 09:42:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:42:48,597 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2021-01-06 09:42:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:48,598 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:42:48,598 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 09:42:48,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 09:42:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-01-06 09:42:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 09:42:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-01-06 09:42:48,603 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2021-01-06 09:42:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:48,603 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-01-06 09:42:48,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:42:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-01-06 09:42:48,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 09:42:48,604 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:48,604 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:48,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:42:48,820 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:48,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1245186091, now seen corresponding path program 21 times [2021-01-06 09:42:48,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:48,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562979925] [2021-01-06 09:42:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:42:49,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562979925] [2021-01-06 09:42:49,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840572719] [2021-01-06 09:42:49,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:50,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:42:50,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:42:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 09:42:50,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:50,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2021-01-06 09:42:50,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074718687] [2021-01-06 09:42:50,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 09:42:50,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 09:42:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:42:50,458 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 36 states. [2021-01-06 09:42:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:50,639 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-01-06 09:42:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 09:42:50,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 73 [2021-01-06 09:42:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:50,640 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:42:50,640 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 09:42:50,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 09:42:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 09:42:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-01-06 09:42:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:42:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 09:42:50,647 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2021-01-06 09:42:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:50,647 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 09:42:50,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 09:42:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 09:42:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:42:50,648 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:50,648 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:50,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:50,864 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash 772524689, now seen corresponding path program 22 times [2021-01-06 09:42:50,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:50,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830319581] [2021-01-06 09:42:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:42:51,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830319581] [2021-01-06 09:42:51,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552225526] [2021-01-06 09:42:51,330 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 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 09:42:51,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:42:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 09:42:51,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:51,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-01-06 09:42:51,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460678364] [2021-01-06 09:42:51,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 09:42:51,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 09:42:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:42:51,853 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2021-01-06 09:42:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:52,072 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-01-06 09:42:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 09:42:52,073 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2021-01-06 09:42:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:52,074 INFO L225 Difference]: With dead ends: 119 [2021-01-06 09:42:52,074 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:42:52,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 09:42:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:42:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-01-06 09:42:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:42:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-01-06 09:42:52,080 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2021-01-06 09:42:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:52,080 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-01-06 09:42:52,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 09:42:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-01-06 09:42:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:42:52,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:52,081 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:52,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:42:52,296 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1969172659, now seen corresponding path program 23 times [2021-01-06 09:42:52,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:52,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410028146] [2021-01-06 09:42:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 09:42:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410028146] [2021-01-06 09:42:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263815961] [2021-01-06 09:42:52,739 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 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 09:43:07,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 09:43:07,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:43:07,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 09:43:07,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:07,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2021-01-06 09:43:07,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730038762] [2021-01-06 09:43:07,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 09:43:07,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:07,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 09:43:07,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:43:07,873 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 40 states. [2021-01-06 09:43:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:08,083 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-01-06 09:43:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 09:43:08,084 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 81 [2021-01-06 09:43:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:08,085 INFO L225 Difference]: With dead ends: 125 [2021-01-06 09:43:08,085 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 09:43:08,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 09:43:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 09:43:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-01-06 09:43:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 09:43:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-01-06 09:43:08,088 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2021-01-06 09:43:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:08,088 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-01-06 09:43:08,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 09:43:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-01-06 09:43:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 09:43:08,088 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:08,089 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:08,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:08,289 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:08,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1289615863, now seen corresponding path program 24 times [2021-01-06 09:43:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:08,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054978974] [2021-01-06 09:43:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:08,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054978974] [2021-01-06 09:43:08,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253350659] [2021-01-06 09:43:08,748 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 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 09:43:49,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 09:43:49,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 09:43:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:49,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:49,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 09:43:49,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054091085] [2021-01-06 09:43:49,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 09:43:49,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 09:43:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 09:43:49,303 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 28 states. [2021-01-06 09:43:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:49,414 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-01-06 09:43:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:43:49,415 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2021-01-06 09:43:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:49,416 INFO L225 Difference]: With dead ends: 128 [2021-01-06 09:43:49,416 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 09:43:49,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 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 09:43:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 09:43:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 09:43:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 09:43:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-01-06 09:43:49,420 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2021-01-06 09:43:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:49,420 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-01-06 09:43:49,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 09:43:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-01-06 09:43:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 09:43:49,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:49,421 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:49,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 09:43:49,622 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:49,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1515476551, now seen corresponding path program 25 times [2021-01-06 09:43:49,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:49,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905274570] [2021-01-06 09:43:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:50,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905274570] [2021-01-06 09:43:50,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243198419] [2021-01-06 09:43:50,208 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 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 09:43:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:50,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:43:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:50,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:50,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 09:43:50,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74084214] [2021-01-06 09:43:50,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:43:50,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:50,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:43:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:43:50,446 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 29 states. [2021-01-06 09:43:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:50,572 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2021-01-06 09:43:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 09:43:50,573 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 87 [2021-01-06 09:43:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:50,574 INFO L225 Difference]: With dead ends: 130 [2021-01-06 09:43:50,574 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 09:43:50,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:43:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 09:43:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 09:43:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 09:43:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-01-06 09:43:50,578 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2021-01-06 09:43:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:50,579 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-01-06 09:43:50,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:43:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-01-06 09:43:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 09:43:50,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:50,580 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:50,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 09:43:50,793 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:50,794 INFO L82 PathProgramCache]: Analyzing trace with hash -30175483, now seen corresponding path program 26 times [2021-01-06 09:43:50,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:50,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62291094] [2021-01-06 09:43:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:51,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62291094] [2021-01-06 09:43:51,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815619045] [2021-01-06 09:43:51,324 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 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 09:43:51,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:43:51,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:51,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 09:43:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:51,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:51,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 09:43:51,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132290552] [2021-01-06 09:43:51,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 09:43:51,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:51,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 09:43:51,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:43:51,542 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 30 states. [2021-01-06 09:43:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:51,669 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-01-06 09:43:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:43:51,670 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 89 [2021-01-06 09:43:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:51,671 INFO L225 Difference]: With dead ends: 132 [2021-01-06 09:43:51,671 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 09:43:51,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 09:43:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 09:43:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-01-06 09:43:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 09:43:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-01-06 09:43:51,676 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2021-01-06 09:43:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:51,677 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-01-06 09:43:51,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 09:43:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-01-06 09:43:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:43:51,677 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:51,677 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:51,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 09:43:51,888 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash 656904259, now seen corresponding path program 27 times [2021-01-06 09:43:51,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:51,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693122109] [2021-01-06 09:43:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:43:52,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693122109] [2021-01-06 09:43:52,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825141760] [2021-01-06 09:43:52,451 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 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 09:43:56,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 09:43:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:56,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:43:56,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-01-06 09:43:57,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:57,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2021-01-06 09:43:57,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448807733] [2021-01-06 09:43:57,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 09:43:57,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:57,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 09:43:57,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:43:57,316 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 45 states. [2021-01-06 09:43:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:57,573 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-01-06 09:43:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 09:43:57,574 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 91 [2021-01-06 09:43:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:57,575 INFO L225 Difference]: With dead ends: 137 [2021-01-06 09:43:57,575 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 09:43:57,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 09:43:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 09:43:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-01-06 09:43:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 09:43:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-01-06 09:43:57,580 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2021-01-06 09:43:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:57,580 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-01-06 09:43:57,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 09:43:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-01-06 09:43:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 09:43:57,581 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:57,581 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:57,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 09:43:57,793 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:57,794 INFO L82 PathProgramCache]: Analyzing trace with hash -32748545, now seen corresponding path program 28 times [2021-01-06 09:43:57,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:57,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380736201] [2021-01-06 09:43:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:43:58,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380736201] [2021-01-06 09:43:58,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661638349] [2021-01-06 09:43:58,439 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 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 09:43:58,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:43:58,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:58,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:43:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 09:43:59,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:59,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2021-01-06 09:43:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587535696] [2021-01-06 09:43:59,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 09:43:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 09:43:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:43:59,092 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 47 states. [2021-01-06 09:43:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:59,315 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-01-06 09:43:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 09:43:59,316 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 95 [2021-01-06 09:43:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:59,317 INFO L225 Difference]: With dead ends: 143 [2021-01-06 09:43:59,317 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 09:43:59,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 09:43:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 09:43:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2021-01-06 09:43:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 09:43:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-01-06 09:43:59,322 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2021-01-06 09:43:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:59,322 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-01-06 09:43:59,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 09:43:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-01-06 09:43:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 09:43:59,323 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:59,323 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:59,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:59,535 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash 808565179, now seen corresponding path program 29 times [2021-01-06 09:43:59,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:59,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317642938] [2021-01-06 09:43:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:44:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:44:00,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317642938] [2021-01-06 09:44:00,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126794124] [2021-01-06 09:44:00,232 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 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 09:46:03,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 09:46:03,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:46:03,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 09:46:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:46:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:46:03,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:46:03,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 09:46:03,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542816768] [2021-01-06 09:46:03,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 09:46:03,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:46:03,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 09:46:03,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:46:03,977 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 33 states. [2021-01-06 09:46:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:46:04,130 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2021-01-06 09:46:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 09:46:04,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2021-01-06 09:46:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:46:04,133 INFO L225 Difference]: With dead ends: 146 [2021-01-06 09:46:04,133 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 09:46:04,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:46:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 09:46:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 09:46:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 09:46:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-01-06 09:46:04,140 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 99 [2021-01-06 09:46:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:46:04,140 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-01-06 09:46:04,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 09:46:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-01-06 09:46:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 09:46:04,141 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:46:04,141 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:46:04,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:46:04,358 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:46:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:46:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1405368967, now seen corresponding path program 30 times [2021-01-06 09:46:04,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:46:04,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618519466] [2021-01-06 09:46:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:46:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:46:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:46:05,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618519466] [2021-01-06 09:46:05,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9143020] [2021-01-06 09:46:05,064 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 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