/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_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:01:37,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:01:37,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:01:37,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:01:37,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:01:37,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:01:37,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:01:37,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:01:37,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:01:37,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:01:37,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:01:37,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-01-06 10:01:37,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:01:37,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:01:37,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:01:37,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:01:37,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:01:37,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:01:37,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:01:37,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:01:37,647 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:01:37,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:01:37,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:01:37,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:01:37,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:01:37,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:01:37,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:01:37,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:01:37,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:01:37,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:01:37,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:01:37,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:01:37,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:01:37,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:01:37,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:01:37,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:01:37,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:01:37,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:01:37,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:01:37,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:01:37,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:01:37,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:01:38,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:01:38,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:01:38,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:01:38,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:01:38,090 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:01:38,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_06.i [2021-01-06 10:01:38,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6a338f003/68fa40c5345e4bf9b7b3b3fab4369417/FLAG2734e69e1 [2021-01-06 10:01:38,678 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:01:38,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_06.i [2021-01-06 10:01:38,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6a338f003/68fa40c5345e4bf9b7b3b3fab4369417/FLAG2734e69e1 [2021-01-06 10:01:39,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6a338f003/68fa40c5345e4bf9b7b3b3fab4369417 [2021-01-06 10:01:39,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:01:39,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:01:39,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:01:39,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:01:39,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:01:39,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c41013b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39, skipping insertion in model container [2021-01-06 10:01:39,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:01:39,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:01:39,280 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_two_index_06.i[814,827] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 10:01:39,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:01:39,306 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:01:39,317 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_two_index_06.i[814,827] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 10:01:39,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:01:39,344 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:01:39,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39 WrapperNode [2021-01-06 10:01:39,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:01:39,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:01:39,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:01:39,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:01:39,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:01:39,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:01:39,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:01:39,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:01:39,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... [2021-01-06 10:01:39,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:01:39,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:01:39,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:01:39,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:01:39,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:01:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:01:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:01:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:01:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:01:39,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:01:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:01:39,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:01:39,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:01:39,772 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:01:39,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:01:39 BoogieIcfgContainer [2021-01-06 10:01:39,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:01:39,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:01:39,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:01:39,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:01:39,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:01:39" (1/3) ... [2021-01-06 10:01:39,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4add95fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:01:39, skipping insertion in model container [2021-01-06 10:01:39,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:39" (2/3) ... [2021-01-06 10:01:39,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4add95fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:01:39, skipping insertion in model container [2021-01-06 10:01:39,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:01:39" (3/3) ... [2021-01-06 10:01:39,783 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2021-01-06 10:01:39,790 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:01:39,795 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:01:39,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:01:39,843 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:01:39,843 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:01:39,844 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:01:39,844 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:01:39,844 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:01:39,844 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:01:39,844 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:01:39,844 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:01:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2021-01-06 10:01:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:01:39,865 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:39,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:39,866 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:39,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2021-01-06 10:01:39,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:39,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081402887] [2021-01-06 10:01:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:40,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081402887] [2021-01-06 10:01:40,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:01:40,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:01:40,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881569099] [2021-01-06 10:01:40,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:01:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:40,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:01:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:01:40,165 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2021-01-06 10:01:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:40,260 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-01-06 10:01:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:01:40,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 10:01:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:40,283 INFO L225 Difference]: With dead ends: 28 [2021-01-06 10:01:40,283 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 10:01:40,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:01:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 10:01:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 10:01:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 10:01:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 10:01:40,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-01-06 10:01:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:40,355 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 10:01:40,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:01:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 10:01:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:01:40,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:40,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:40,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:01:40,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2021-01-06 10:01:40,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:40,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627352020] [2021-01-06 10:01:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:40,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627352020] [2021-01-06 10:01:40,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023791791] [2021-01-06 10:01:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:01:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:01:40,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:01:40,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-01-06 10:01:40,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585609919] [2021-01-06 10:01:40,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:01:40,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:01:40,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:01:40,556 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2021-01-06 10:01:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:40,590 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-01-06 10:01:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:01:40,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:01:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:40,592 INFO L225 Difference]: With dead ends: 24 [2021-01-06 10:01:40,593 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 10:01:40,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:01:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 10:01:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-01-06 10:01:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:01:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-01-06 10:01:40,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-01-06 10:01:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:40,604 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-01-06 10:01:40,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:01:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-01-06 10:01:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:01:40,607 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:40,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:40,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:01:40,821 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2021-01-06 10:01:40,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:40,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712107988] [2021-01-06 10:01:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:40,914 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 10:01:40,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712107988] [2021-01-06 10:01:40,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833190360] [2021-01-06 10:01:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:01:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:41,027 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 10:01:41,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:41,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:01:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654849519] [2021-01-06 10:01:41,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:01:41,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:01:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:41,030 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2021-01-06 10:01:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:41,059 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-01-06 10:01:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:01:41,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 10:01:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:41,061 INFO L225 Difference]: With dead ends: 28 [2021-01-06 10:01:41,061 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 10:01:41,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 10:01:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2021-01-06 10:01:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 10:01:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 10:01:41,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-01-06 10:01:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:41,066 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 10:01:41,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:01:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 10:01:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:01:41,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:41,067 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:41,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:41,282 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:41,284 INFO L82 PathProgramCache]: Analyzing trace with hash -519784366, now seen corresponding path program 2 times [2021-01-06 10:01:41,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:41,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213168577] [2021-01-06 10:01:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:41,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213168577] [2021-01-06 10:01:41,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483529119] [2021-01-06 10:01:41,337 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 10:01:41,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:41,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:01:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:01:41,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:41,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:01:41,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60115252] [2021-01-06 10:01:41,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:01:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:01:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:01:41,447 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2021-01-06 10:01:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:41,490 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-01-06 10:01:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:01:41,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 10:01:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:41,491 INFO L225 Difference]: With dead ends: 36 [2021-01-06 10:01:41,491 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:01:41,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:01:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:01:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-01-06 10:01:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:01:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 10:01:41,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-01-06 10:01:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:41,497 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 10:01:41,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:01:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 10:01:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:01:41,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:41,498 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:41,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:41,714 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:41,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 3 times [2021-01-06 10:01:41,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:41,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27273545] [2021-01-06 10:01:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:41,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27273545] [2021-01-06 10:01:41,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261122231] [2021-01-06 10:01:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:41,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:01:41,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:01:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:41,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:41,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:01:41,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250197046] [2021-01-06 10:01:41,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:01:41,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:01:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:01:41,887 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2021-01-06 10:01:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:41,925 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-01-06 10:01:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:01:41,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:01:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:41,926 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:01:41,927 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:01:41,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:01:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:01:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-01-06 10:01:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:01:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 10:01:41,932 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2021-01-06 10:01:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:41,933 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 10:01:41,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:01:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 10:01:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:01:41,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:41,934 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:42,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:42,149 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash -696235598, now seen corresponding path program 4 times [2021-01-06 10:01:42,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:42,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386837867] [2021-01-06 10:01:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:42,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386837867] [2021-01-06 10:01:42,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181614874] [2021-01-06 10:01:42,229 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 10:01:42,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:42,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:42,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:01:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:01:42,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:42,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-01-06 10:01:42,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370556961] [2021-01-06 10:01:42,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:01:42,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:01:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:01:42,378 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 11 states. [2021-01-06 10:01:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:42,449 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:01:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:01:42,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 10:01:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:42,451 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:01:42,451 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:01:42,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:01:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:01:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2021-01-06 10:01:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:01:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-01-06 10:01:42,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2021-01-06 10:01:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:42,458 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-01-06 10:01:42,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:01:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-01-06 10:01:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:01:42,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:42,459 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:42,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:01:42,673 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:42,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1003861208, now seen corresponding path program 5 times [2021-01-06 10:01:42,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:42,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442007394] [2021-01-06 10:01:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:01:42,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442007394] [2021-01-06 10:01:42,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145239595] [2021-01-06 10:01:42,771 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 10:01:42,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:01:42,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:01:42,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:42,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:42,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 15 [2021-01-06 10:01:42,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32894941] [2021-01-06 10:01:42,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:01:42,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:01:42,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:01:42,982 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 15 states. [2021-01-06 10:01:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:43,073 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-01-06 10:01:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:01:43,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2021-01-06 10:01:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:43,074 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:01:43,074 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:01:43,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:01:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:01:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2021-01-06 10:01:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:01:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 10:01:43,081 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2021-01-06 10:01:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:43,081 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 10:01:43,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:01:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 10:01:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:01:43,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:43,083 INFO L422 BasicCegarLoop]: trace histogram [12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:43,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:43,296 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:43,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:43,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1992579314, now seen corresponding path program 6 times [2021-01-06 10:01:43,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:43,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215484256] [2021-01-06 10:01:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 10:01:43,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215484256] [2021-01-06 10:01:43,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657630370] [2021-01-06 10:01:43,420 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 10:01:43,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:01:43,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:43,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:01:43,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 10:01:43,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:43,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:01:43,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884440375] [2021-01-06 10:01:43,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:01:43,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:01:43,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:01:43,789 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2021-01-06 10:01:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:43,850 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-01-06 10:01:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:01:43,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2021-01-06 10:01:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:43,852 INFO L225 Difference]: With dead ends: 65 [2021-01-06 10:01:43,852 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:01:43,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:01:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:01:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2021-01-06 10:01:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:01:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-01-06 10:01:43,858 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2021-01-06 10:01:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:43,858 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-01-06 10:01:43,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:01:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-01-06 10:01:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:01:43,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:43,860 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:44,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:44,075 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:44,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1691862744, now seen corresponding path program 7 times [2021-01-06 10:01:44,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:44,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951112684] [2021-01-06 10:01:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 10:01:44,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951112684] [2021-01-06 10:01:44,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488777143] [2021-01-06 10:01:44,185 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 10:01:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:01:44,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 10:01:44,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:44,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2021-01-06 10:01:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836722515] [2021-01-06 10:01:44,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:01:44,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:44,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:01:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:01:44,507 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 21 states. [2021-01-06 10:01:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:44,650 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-01-06 10:01:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:01:44,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2021-01-06 10:01:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:44,652 INFO L225 Difference]: With dead ends: 85 [2021-01-06 10:01:44,652 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:01:44,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:01:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:01:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 36. [2021-01-06 10:01:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:01:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 10:01:44,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2021-01-06 10:01:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:44,660 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 10:01:44,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:01:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 10:01:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:01:44,661 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:44,661 INFO L422 BasicCegarLoop]: trace histogram [18, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:44,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:01:44,877 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1563220882, now seen corresponding path program 8 times [2021-01-06 10:01:44,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:44,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974979067] [2021-01-06 10:01:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-01-06 10:01:45,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974979067] [2021-01-06 10:01:45,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833365240] [2021-01-06 10:01:45,060 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 10:01:45,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:45,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:01:45,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 10:01:45,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:45,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21] total 27 [2021-01-06 10:01:45,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132932636] [2021-01-06 10:01:45,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:01:45,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:45,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:01:45,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:01:45,398 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 27 states. [2021-01-06 10:01:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:45,557 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-01-06 10:01:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:01:45,557 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2021-01-06 10:01:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:45,558 INFO L225 Difference]: With dead ends: 98 [2021-01-06 10:01:45,559 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 10:01:45,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:01:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 10:01:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 43. [2021-01-06 10:01:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 10:01:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-01-06 10:01:45,567 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 34 [2021-01-06 10:01:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:45,567 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-01-06 10:01:45,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:01:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-01-06 10:01:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:01:45,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:45,569 INFO L422 BasicCegarLoop]: trace histogram [24, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:45,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:45,783 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash -959154600, now seen corresponding path program 9 times [2021-01-06 10:01:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:45,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596741845] [2021-01-06 10:01:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 10:01:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596741845] [2021-01-06 10:01:45,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085910752] [2021-01-06 10:01:45,951 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 10:01:46,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:01:46,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:46,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:01:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 10:01:46,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:46,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:01:46,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213629476] [2021-01-06 10:01:46,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:01:46,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:01:46,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:01:46,199 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 12 states. [2021-01-06 10:01:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:46,276 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-01-06 10:01:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:01:46,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 10:01:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:46,277 INFO L225 Difference]: With dead ends: 95 [2021-01-06 10:01:46,278 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 10:01:46,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 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 10:01:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 10:01:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 44. [2021-01-06 10:01:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:01:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 10:01:46,285 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2021-01-06 10:01:46,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:46,285 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 10:01:46,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:01:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 10:01:46,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:01:46,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:46,287 INFO L422 BasicCegarLoop]: trace histogram [24, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:46,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:46,502 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 382424626, now seen corresponding path program 10 times [2021-01-06 10:01:46,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:46,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295265744] [2021-01-06 10:01:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 10:01:46,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295265744] [2021-01-06 10:01:46,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33500054] [2021-01-06 10:01:46,664 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 10:01:46,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:46,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:01:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:47,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:47,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 27] total 34 [2021-01-06 10:01:47,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209887456] [2021-01-06 10:01:47,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:01:47,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:01:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=562, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:01:47,068 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 34 states. [2021-01-06 10:01:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:47,241 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-01-06 10:01:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:01:47,242 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2021-01-06 10:01:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:47,242 INFO L225 Difference]: With dead ends: 119 [2021-01-06 10:01:47,243 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 10:01:47,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=560, Invalid=562, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:01:47,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 10:01:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 52. [2021-01-06 10:01:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:01:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 10:01:47,264 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 42 [2021-01-06 10:01:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:47,267 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 10:01:47,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:01:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 10:01:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 10:01:47,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:47,269 INFO L422 BasicCegarLoop]: trace histogram [31, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:47,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:01:47,483 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:47,484 INFO L82 PathProgramCache]: Analyzing trace with hash -420901837, now seen corresponding path program 11 times [2021-01-06 10:01:47,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:47,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361197269] [2021-01-06 10:01:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-01-06 10:01:47,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361197269] [2021-01-06 10:01:47,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587789108] [2021-01-06 10:01:47,648 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 10:02:58,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:02:58,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:02:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:02:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:02:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:02:58,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:02:58,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 34] total 40 [2021-01-06 10:02:58,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838431817] [2021-01-06 10:02:58,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:02:58,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:02:58,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:02:58,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=781, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:02:58,629 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 40 states. [2021-01-06 10:02:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:02:58,827 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-01-06 10:02:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:02:58,827 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 50 [2021-01-06 10:02:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:02:58,828 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:02:58,828 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 10:02:58,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=779, Invalid=781, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:02:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 10:02:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 59. [2021-01-06 10:02:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:02:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-01-06 10:02:58,837 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 50 [2021-01-06 10:02:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:02:58,837 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-01-06 10:02:58,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:02:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-01-06 10:02:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 10:02:58,838 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:02:58,838 INFO L422 BasicCegarLoop]: trace histogram [37, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:02:59,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:02:59,040 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:02:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:02:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1334994473, now seen corresponding path program 12 times [2021-01-06 10:02:59,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:02:59,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591940187] [2021-01-06 10:02:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:02:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:02:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-01-06 10:02:59,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591940187] [2021-01-06 10:02:59,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309937013] [2021-01-06 10:02:59,233 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 10:03:16,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:03:16,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:03:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-01-06 10:03:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:16,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:03:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058283626] [2021-01-06 10:03:16,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:03:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:03:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:03:16,446 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 15 states. [2021-01-06 10:03:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:16,555 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2021-01-06 10:03:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:03:16,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2021-01-06 10:03:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:16,557 INFO L225 Difference]: With dead ends: 126 [2021-01-06 10:03:16,557 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 10:03:16,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 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 10:03:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 10:03:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 60. [2021-01-06 10:03:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:03:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 10:03:16,564 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2021-01-06 10:03:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:16,564 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 10:03:16,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:03:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 10:03:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:03:16,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:16,565 INFO L422 BasicCegarLoop]: trace histogram [37, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:16,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:03:16,766 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1616290451, now seen corresponding path program 13 times [2021-01-06 10:03:16,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:16,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320815499] [2021-01-06 10:03:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-01-06 10:03:16,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320815499] [2021-01-06 10:03:16,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610902447] [2021-01-06 10:03:16,969 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 10:03:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:17,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:03:17,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 10:03:17,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:17,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 40] total 47 [2021-01-06 10:03:17,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13347823] [2021-01-06 10:03:17,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:03:17,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:03:17,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:03:17,519 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 47 states. [2021-01-06 10:03:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:17,750 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2021-01-06 10:03:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:03:17,751 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2021-01-06 10:03:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:17,752 INFO L225 Difference]: With dead ends: 153 [2021-01-06 10:03:17,752 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:03:17,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:03:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:03:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 68. [2021-01-06 10:03:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:03:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-01-06 10:03:17,760 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 58 [2021-01-06 10:03:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:17,760 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-01-06 10:03:17,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:03:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-01-06 10:03:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 10:03:17,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:17,761 INFO L422 BasicCegarLoop]: trace histogram [44, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:17,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:17,976 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1412249074, now seen corresponding path program 14 times [2021-01-06 10:03:17,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:17,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757158812] [2021-01-06 10:03:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-01-06 10:03:18,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757158812] [2021-01-06 10:03:18,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632072734] [2021-01-06 10:03:18,207 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 10:03:18,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:03:18,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:18,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:03:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:03:18,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:18,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 47] total 54 [2021-01-06 10:03:18,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720688778] [2021-01-06 10:03:18,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 10:03:18,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:18,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 10:03:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1430, Invalid=1432, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:03:18,832 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 54 states. [2021-01-06 10:03:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:19,094 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2021-01-06 10:03:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 10:03:19,095 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 66 [2021-01-06 10:03:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:19,097 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:03:19,097 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 10:03:19,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1430, Invalid=1432, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:03:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 10:03:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 76. [2021-01-06 10:03:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:03:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-01-06 10:03:19,112 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 66 [2021-01-06 10:03:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:19,112 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-01-06 10:03:19,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 10:03:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-01-06 10:03:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 10:03:19,114 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:19,114 INFO L422 BasicCegarLoop]: trace histogram [51, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:19,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:03:19,330 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:19,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1809073011, now seen corresponding path program 15 times [2021-01-06 10:03:19,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:19,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504926209] [2021-01-06 10:03:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-01-06 10:03:19,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504926209] [2021-01-06 10:03:19,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084418370] [2021-01-06 10:03:19,555 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 10:03:21,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:03:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:21,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:03:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-01-06 10:03:21,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:21,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:03:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228502304] [2021-01-06 10:03:21,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:03:21,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:03:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:03:21,123 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 18 states. [2021-01-06 10:03:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:21,244 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2021-01-06 10:03:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:03:21,245 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2021-01-06 10:03:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:21,246 INFO L225 Difference]: With dead ends: 158 [2021-01-06 10:03:21,246 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 10:03:21,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 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 10:03:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 10:03:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 77. [2021-01-06 10:03:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 10:03:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-01-06 10:03:21,267 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2021-01-06 10:03:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:21,267 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-01-06 10:03:21,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:03:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-01-06 10:03:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:03:21,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:21,268 INFO L422 BasicCegarLoop]: trace histogram [51, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:21,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:03:21,480 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash 298134647, now seen corresponding path program 16 times [2021-01-06 10:03:21,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:21,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12449221] [2021-01-06 10:03:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-01-06 10:03:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12449221] [2021-01-06 10:03:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37357381] [2021-01-06 10:03:21,719 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 10:03:21,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:03:21,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 10:03:21,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-01-06 10:03:22,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:22,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 54] total 62 [2021-01-06 10:03:22,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359035923] [2021-01-06 10:03:22,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 10:03:22,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:22,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 10:03:22,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 10:03:22,420 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 62 states. [2021-01-06 10:03:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:22,775 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2021-01-06 10:03:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 10:03:22,775 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 75 [2021-01-06 10:03:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:22,777 INFO L225 Difference]: With dead ends: 189 [2021-01-06 10:03:22,777 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 10:03:22,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 10:03:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 10:03:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 86. [2021-01-06 10:03:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 10:03:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-01-06 10:03:22,783 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 75 [2021-01-06 10:03:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:22,784 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-01-06 10:03:22,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 10:03:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-01-06 10:03:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 10:03:22,785 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:22,785 INFO L422 BasicCegarLoop]: trace histogram [59, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:22,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:03:22,999 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:23,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1931527795, now seen corresponding path program 17 times [2021-01-06 10:03:23,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:23,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845197515] [2021-01-06 10:03:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1906 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-01-06 10:03:23,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845197515] [2021-01-06 10:03:23,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544506218] [2021-01-06 10:03:23,251 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